diff --git a/addons/web/static/src/js/corelib.js b/addons/web/static/src/js/corelib.js
index b5fbacc7927..8c38724b1d5 100644
--- a/addons/web/static/src/js/corelib.js
+++ b/addons/web/static/src/js/corelib.js
@@ -1440,6 +1440,10 @@ instance.web.JsonRPC = instance.web.CallbackEnabled.extend({
     },
 });
 
+instance.web.py_eval = function(expr, context) {
+    return py.eval(expr, _.extend({}, context || {}, {"true": true, "false": false, "null": null}));
+};
+
 }
 
 // vim:et fdc=0 fdl=0 foldnestmax=3 fdm=syntax:
diff --git a/addons/web/static/src/js/view_form.js b/addons/web/static/src/js/view_form.js
index afb5e258c0b..75e48334f5c 100644
--- a/addons/web/static/src/js/view_form.js
+++ b/addons/web/static/src/js/view_form.js
@@ -956,7 +956,7 @@ instance.web.FormView = instance.web.View.extend(instance.web.form.FieldManagerM
         var self = this;
         return this.reload_mutex.exec(function() {
             if (self.dataset.index == null) {
-                self.do_prev_view();
+                self.trigger("previous_view");
                 return $.Deferred().reject().promise();
             }
             if (self.dataset.index == null || self.dataset.index < 0) {
@@ -2087,11 +2087,7 @@ instance.web.form.AbstractField = instance.web.form.FormWidget.extend(instance.w
         this.field = this.field_manager.get_field_desc(this.name);
         this.widget = this.node.attrs.widget;
         this.string = this.node.attrs.string || this.field.string || this.name;
-        try {
-            this.options = JSON.parse(this.node.attrs.options || '{}');
-        } catch (e) {
-            throw new Error(_.str.sprintf(_t("Widget options for field '%s' are not valid JSON."), this.name));
-        }
+        this.options = instance.web.py_eval(this.node.attrs.options || '{}');
         this.set({'value': false});
 
         this.on("change:value", this, function() {
@@ -2877,7 +2873,7 @@ instance.web.form.CompletionFieldMixin = {
             self.build_domain(),
             new instance.web.CompoundContext(self.build_context(), context || {})
         );
-        pop.on_select_elements.add(function(element_ids) {
+        pop.on("select_elements",self,function(element_ids) {
             self.add_id(element_ids[0]);
             self.focus();
         });
@@ -3598,7 +3594,7 @@ instance.web.form.One2ManyViewManager = instance.web.ViewManager.extend({
             form_view_options: {'not_interactible_on_create':true},
             readonly: self.o2m.get("effective_readonly")
         });
-        pop.on_select_elements.add_last(function() {
+        pop.on("select_elements", self, function() {
             self.o2m.reload_current_view();
         });
     },
@@ -3684,7 +3680,7 @@ instance.web.form.One2ManyListView = instance.web.ListView.extend({
                 self.o2m.build_domain(),
                 self.o2m.build_context()
             );
-            pop.on_select_elements.add_last(function() {
+            pop.on("select_elements", self, function() {
                 self.o2m.reload_current_view();
             });
         }
@@ -4121,7 +4117,7 @@ instance.web.form.Many2ManyListView = instance.web.ListView.extend(/** @lends in
             this.m2m_field.build_context()
         );
         var self = this;
-        pop.on_select_elements.add(function(element_ids) {
+        pop.on("select_elements", self, function(element_ids) {
             _.each(element_ids, function(one_id) {
                 if(! _.detect(self.dataset.ids, function(x) {return x == one_id;})) {
                     self.dataset.set_ids([].concat(self.dataset.ids, [one_id]));
@@ -4236,7 +4232,7 @@ instance.web.form.FieldMany2ManyKanban = instance.web.form.AbstractField.extend(
                 new instance.web.CompoundDomain(this.build_domain(), ["!", ["id", "in", this.dataset.ids]]),
                 this.build_context()
             );
-            pop.on_select_elements.add(function(element_ids) {
+            pop.on("select_elements", self, function(element_ids) {
                 _.each(element_ids, function(one_id) {
                     if(! _.detect(self.dataset.ids, function(x) {return x == one_id;})) {
                         self.dataset.set_ids([].concat(self.dataset.ids, [one_id]));
@@ -4456,11 +4452,12 @@ instance.web.form.AbstractFormPopup = instance.web.Widget.extend({
             self.view_form.do_show();
         });
     },
-    on_select_elements: function(element_ids) {
+    elements_selected: function(element_ids) {
+        this.trigger("select_elements",element_ids);
     },
     check_exit: function(no_destroy) {
         if (this.created_elements.length > 0) {
-            this.on_select_elements(this.created_elements);
+            this.elements_selected(this.created_elements);
             this.created_elements = [];
         }
         this.destroy();
@@ -4571,7 +4568,7 @@ instance.web.form.SelectCreatePopup = instance.web.form.AbstractFormPopup.extend
                 });
                 var $sbutton = self.$buttonpane.find(".oe_selectcreatepopup-search-select");
                 $sbutton.click(function() {
-                    self.on_select_elements(self.selected_ids);
+                    self.elements_selected(self.selected_ids);
                     self.destroy();
                 });
             });
@@ -4613,7 +4610,7 @@ instance.web.form.SelectCreateListView = instance.web.ListView.extend({
         this.popup.new_object();
     },
     select_record: function(index) {
-        this.popup.on_select_elements([this.dataset.ids[index]]);
+        this.popup.elements_selected([this.dataset.ids[index]]);
         this.popup.destroy();
     },
     do_select: function(ids, records) {
diff --git a/addons/web/static/src/js/views.js b/addons/web/static/src/js/views.js
index f985e5f6dc8..5f90c4215f7 100644
--- a/addons/web/static/src/js/views.js
+++ b/addons/web/static/src/js/views.js
@@ -525,8 +525,8 @@ instance.web.ViewManager =  instance.web.Widget.extend({
             controller.set_embedded_view(view.embedded_view);
         }
         controller.on('switch_mode', self, this.switch_mode);
-
-        controller.do_prev_view.add_last(this.on_prev_view);
+        controller.on('previous_view', self, this.prev_view);
+        
         var container = this.$el.find(".oe_view_manager_view_" + view_type);
         var view_promise = controller.appendTo(container);
         this.views[view_type].controller = controller;
@@ -602,7 +602,7 @@ instance.web.ViewManager =  instance.web.Widget.extend({
      * @param {String} [options.default=null] view to switch to if no previous view
      * @returns {$.Deferred} switching end signal
      */
-    on_prev_view: function (options) {
+    prev_view: function (options) {
         options = options || {};
         var current_view = this.views_history.pop();
         var previous_view = this.views_history[this.views_history.length - 1] || options['default'];
@@ -1266,8 +1266,7 @@ instance.web.View = instance.web.Widget.extend({
      * @param {Boolean} [options.created=false] resource was created
      * @param {String} [options.default=null] view to switch to if no previous view
      */
-    do_prev_view: function (options) {
-    },
+
     do_search: function(view) {
     },
     on_sidebar_export: function() {
diff --git a/addons/web/tests/test_menu.py b/addons/web/tests/test_menu.py
index 1bfa89d9a64..c5e1b948b67 100644
--- a/addons/web/tests/test_menu.py
+++ b/addons/web/tests/test_menu.py
@@ -4,7 +4,7 @@ import mock
 import unittest2
 
 from ..controllers import main
-from ..common.session import OpenERPSession
+from ..session import OpenERPSession
 
 class Placeholder(object):
     def __init__(self, **kwargs):
diff --git a/addons/web/tests/test_view.py b/addons/web/tests/test_view.py
index beb6996b8e2..a9354d0a6c7 100644
--- a/addons/web/tests/test_view.py
+++ b/addons/web/tests/test_view.py
@@ -6,7 +6,7 @@ import unittest2
 import simplejson
 
 import web.controllers.main
-from ..common import nonliterals, session as s
+from .. import nonliterals, session as s
 
 def field_attrs(fields_view_get, fieldname):
     (field,) =  filter(lambda f: f['attrs'].get('name') == fieldname,
diff --git a/addons/web_diagram/static/src/js/diagram.js b/addons/web_diagram/static/src/js/diagram.js
index 9fd74853c3c..5b699fa7870 100644
--- a/addons/web_diagram/static/src/js/diagram.js
+++ b/addons/web_diagram/static/src/js/diagram.js
@@ -273,7 +273,7 @@ instance.web.DiagramView = instance.web.View.extend({
             self.dataset.domain,
             self.context || self.dataset.context
         );
-        pop.on_select_elements.add_last(function(element_ids) {
+        pop.on("select_elements", self, function(element_ids) {
             self.dataset.read_index(_.keys(self.fields_view.fields)).pipe(self.on_diagram_loaded);
         });
 
@@ -325,8 +325,7 @@ instance.web.DiagramView = instance.web.View.extend({
             this.dataset.domain,
             this.context || this.dataset.context
         );
-
-        pop.on_select_elements.add_last(function(element_ids) {
+        pop.on("select_elements", self, function(element_ids) {
             self.dataset.read_index(_.keys(self.fields_view.fields)).pipe(self.on_diagram_loaded);
         });
         // We want to destroy the dummy edge after a creation cancel. This destroys it even if we save the changes.
diff --git a/addons/web_gantt/static/src/js/gantt.js b/addons/web_gantt/static/src/js/gantt.js
index 66d699c2cde..32bfea8e212 100644
--- a/addons/web_gantt/static/src/js/gantt.js
+++ b/addons/web_gantt/static/src/js/gantt.js
@@ -222,7 +222,7 @@ instance.web_gantt.GanttView = instance.web.View.extend({
     on_task_create: function() {
         var self = this;
         var pop = new instance.web.form.SelectCreatePopup(this);
-        pop.on_select_elements.add_last(function() {
+        pop.on("select_elements", self, function() {
             self.reload();
         });
         pop.select_element(
diff --git a/addons/web_kanban/static/src/js/kanban.js b/addons/web_kanban/static/src/js/kanban.js
index 537325394e9..37aea87e50e 100644
--- a/addons/web_kanban/static/src/js/kanban.js
+++ b/addons/web_kanban/static/src/js/kanban.js
@@ -1067,7 +1067,7 @@ instance.web_kanban.QuickCreate = instance.web.Widget.extend({
             [],
             {"default_name": self.$input.val()}
         );
-        pop.on_select_elements.add(function(element_ids) {
+        pop.on("select_elements", self, function(element_ids) {
             self.$input.val("");
             self.trigger('added', element_ids[0]);
         });