[FIX] fix bouncing issue in form view (web client)

the buttons edit and create have been ungrouped recently.  As a
side effect (of course), the bouncing effect in form view is broken.
This should hopefully fix the issue without introducing any other
problems :/

addons/web/static/src/css/base.css

@@ -1155,6 +1155,13 @@
 .openerp .oe-view-manager-header .oe_form_buttons {
   padding: 0;
 }
+.openerp .oe-view-manager-header .oe_form_buttons_view > button {
+  float: left;
+}
+.openerp .oe-view-manager-header .oe_form_buttons_view > button:last-child {
+  float: right;
+  margin-left: 4px;
+}
 .openerp .oe-view-manager-header .oe-pager-buttons {
   min-height: 30px;
 }

addons/web/static/src/css/base.sass

@@ -994,6 +994,13 @@ $sheet-padding: 16px
                         width: 100%
         .oe_form_buttons
             padding: 0
+        .oe_form_buttons_view
+            > button
+                float: left
+                &:last-child
+                    float: right
+                    margin-left: 4px
+
         .oe-pager-buttons
             min-height: 30px
     .oe_view_manager_inline, .oe_view_manager_inlineview