use invalidateOptionsMenu from android support library
fixed bug when clicking on a "file delete" event
remove unused imports
fixed OOM bug when generating picture thumbnails
fixed lifecycle of RenameFileDialog
fix test class path after refactoring util/ package
fixed a possible NPE bug in ShareToSeafileActivity
fixed a bug in FileActivity
fixed another possible NPE bug in ShareToSeafileActivity
add nots about a bug in android 4.0.3/4.0.4