Fixed issue when creating labels in dropdown

app/assets/javascripts/labels_select.js.coffee

@@ -33,7 +33,7 @@ class @LabelsSelect
               color: newColorField.val()
             }, (label) ->
               $('.js-new-label-btn').enable()
-              $('.dropdown-menu-back', $(dropdown).parent()).trigger "click"
+              $('.dropdown-menu-back', $(dropdown).parents('.dropdown')).trigger "click"
       $(dropdown).glDropdown(
         data: (term, callback) ->

app/assets/stylesheets/pages/issuable.scss

@@ -243,7 +243,7 @@
     }
   }
-  .btn {
+  .btn:not(.btn-primary) {
     background: $gray-normal;
     border: 1px solid $border-gray-normal;
     &:hover {