Fixed ui-sortable bower dependency that was ambiguous

Author: Dervisevic

bower.json

@@ -41,7 +41,7 @@
     "jquery": "~2.1.1",
     "angular-mocks": ">= 1.2",
     "tx-tinymce": ">= 0.0.5",
-    "angular-ui-sortable": "~0.12.11",
+    "angular-ui-sortable": ">=0.12.11",
     "bootstrap-vertical-tabs": "~1.2.0"
   }
 }