fixed remove_widgets in app_editor

Ignore-this: aeb458c46101876f50dc397fd82fbb6

darcs-hash:20140502045647-c21fe-b9e302cdae0436de183f62a5d341c53e64d2913e
added "store" as keyword in app editor

Ignore-this: facefdc5adf50ce3b517381252b34629

darcs-hash:20140502045805-c21fe-9e936ffc4f56bfe611e8819e3d10bd1a874074d1