Fixing few issues with context menu icon missing.

Introduced a new ajax function to return the HTTP Status code 410 (GONE).
Changed the location of the javascript from each modules, it loads.

Added .swp, .swo files in the .gitignore file

web/pgadmin/utils/ajax.py

@@ -92,3 +92,11 @@ def success_return(message=''):
                 success=1,
                 info=message
     )
+
+def gone(errormsg=''):
+    """Create a response with HTTP status code 410 - GONE."""
+    return make_json_response(
+                status=410,
+                success=0,
+                errormsg=errormsg
+    )