[IMP] web: Improve alert banner to update translations

Purpose
=======

Simplify / reduce the warning message when we update a record in multi-languages

Specification
=============

1/ Make the translation banner little bit lighter in design
2/ Make it still visible when coming back from breadcrumb

addons/web/static/src/js/views/basic/basic_controller.js

@@ -581,6 +581,7 @@ var BasicController = AbstractController.extend(FieldManagerMixin, {
      */
     _onTranslate: function (event) {
         event.stopPropagation();
+        var self = this;
         var record = this.model.get(event.data.id, {raw: true});
         this._rpc({
             route: '/web/dataset/call_button',
@@ -589,7 +590,16 @@ var BasicController = AbstractController.extend(FieldManagerMixin, {
                 method: 'translate_fields',
                 args: [record.model, record.res_id, event.data.fieldName, record.getContext()],
             }
-        }).then(this.do_action.bind(this));
+        }).then(function (result) {
+            self.do_action(result, {
+                on_reverse_breadcrumb: function () {
+                    if (self.renderer.alertFields.length) {
+                        self.renderer.displayTranslationAlert();
+                    }
+                    return false
+                },
+            })
+        });
     },
 });
 

addons/web/static/src/js/views/form/form_controller.js

@@ -205,7 +205,8 @@ var FormController = BasicController.extend({
                     }
                 }
                 if (alertFields.length) {
-                    self.renderer.displayTranslationAlert(alertFields);
+                    self.renderer.alertFields = alertFields;
+                    self.renderer.displayTranslationAlert();
                 }
             }
             return changedFields;

addons/web/static/src/js/views/form/form_renderer.js

@@ -82,11 +82,11 @@ var FormRenderer = BasicRenderer.extend({
      *
      * @param {Object[]} alertFields field list
      */
-    displayTranslationAlert: function (alertFields) {
+    displayTranslationAlert: function () {
         this.$('.o_notification_box').remove();
         var $notification = $(qweb.render('notification-box', {type: 'info'}))
             .append(qweb.render('translation-alert', {
-                fields: alertFields,
+                fields: this.alertFields,
                 lang: _t.database.parameters.name
             }));
         if (this.$('.o_form_statusbar').length) {

addons/web/static/src/xml/base.xml

@@ -1249,7 +1249,7 @@
 </t>
 
 <t t-name="notification-box">
-    <div t-attf-class="o_notification_box alert alert-dismissible alert-{{type}}" role="alert">
+    <div t-attf-class="o_notification_box mb0 alert alert-dismissible alert-{{type}}" role="alert">
         <button type="button" class="close" data-dismiss="alert" aria-label="Close">
             <span aria-hidden="true" class="fa fa-times"></span>
         </button>
@@ -1257,12 +1257,12 @@
 </t>
 
 <t t-name="translation-alert">
-    <t t-foreach="fields" t-as="field">
-        <div>
-            You have updated <strong><t t-esc="field.string"/></strong> (<t t-esc="lang"/>).
-            <a class="oe_field_translate" t-att-name="field.name" href="#">Update translations</a>
-        </div>
-    </t>
+    <div>
+        Please update translations of :
+        <t t-foreach="fields" t-as="field">
+            <strong><a class="oe_field_translate" t-att-name="field.name" href="#"><t t-esc="field.string"/><t t-if="!field_last">, </t></a></strong>
+        </t>
+    </div>
 </t>
 
 <t t-name="UserMenu">