[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

3 files changed, 15 insertions, 4 deletions

diff --git a/addons/web/static/src/js/views/basic/basic_controller.js b/addons/web/static/src/js/views/basic/basic_controller.js
index c899530de07..44275de7a43 100644
--- a/addons/web/static/src/js/views/basic/basic_controller.js
+++ b/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
+                },
+            })
+        });
     },
 });
 
diff --git a/addons/web/static/src/js/views/form/form_controller.js b/addons/web/static/src/js/views/form/form_controller.js
index a6248c827a2..af220733802 100644
--- a/addons/web/static/src/js/views/form/form_controller.js
+++ b/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;
diff --git a/addons/web/static/src/js/views/form/form_renderer.js b/addons/web/static/src/js/views/form/form_renderer.js
index ab5e4beb6b5..b9711d1d392 100644
--- a/addons/web/static/src/js/views/form/form_renderer.js
+++ b/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) {