Add spinner to publisher when posting a message

Fixes #4949

app/assets/javascripts/app/views/publisher_view.js

@@ -144,6 +144,8 @@ app.views.Publisher = Backbone.View.extend({
     var serializedForm = $(evt.target).closest("form").serializeObject();
     // disable input while posting, must be after the form is serialized
     this.setInputEnabled(false);
+    this.setButtonsEnabled(false);
+    this.$('#publisher_spinner').removeClass('hidden');
 
     // lulz this code should be killed.
     var statusMessage = new app.models.Post();
@@ -179,6 +181,8 @@ app.views.Publisher = Backbone.View.extend({
       error: function() {
         if( app.publisher ) app.publisher.trigger('publisher:error');
         self.setInputEnabled(true);
+        self.setButtonsEnabled(true);
+        self.$('#publisher_spinner').addClass('hidden');
       }
     });
   },
@@ -346,6 +350,12 @@ app.views.Publisher = Backbone.View.extend({
 
     // enable input
     this.setInputEnabled(true);
+    
+    // enable buttons
+    this.setButtonsEnabled(false);
+    
+    // hide spinner
+    this.$('#publisher_spinner').addClass('hidden');
 
     // clear location
     this.destroyLocation();

app/assets/stylesheets/publisher_blueprint.css.scss

@@ -70,6 +70,12 @@
       }
     }
 
+    #publisher_spinner {
+      position: relative;
+      top: 3px;
+      margin-right: 10px;
+    }
+
     #publisher_service_icons {
       position: relative;
       top: 3px;

app/views/publisher/_publisher_blueprint.html.haml

@@ -49,6 +49,8 @@
 
       .options_and_submit
         .public_toggle
+          %span#publisher_spinner{:class => 'hidden'}
+            = image_tag 'ajax-loader.gif'
           %span#publisher_service_icons
             - if current_user.services
               - for service in current_user.services

app/views/publisher/_publisher_bootstrap.html.haml

@@ -60,6 +60,8 @@
               =t('cancel')
 
           .btn-toolbar.pull-right
+            %span#publisher_spinner{:class => 'hidden'}
+              = image_tag 'ajax-loader.gif'
             %span#publisher_service_icons
               - if current_user.services
                 - for service in current_user.services