add 'Home' key event to close filemanager
allow closing non-existent widget but throw a warning
Merge pull request #1093 from Frenzie/master

Fix Kobo resume in new hardware abstraction.
Merge pull request #1090 from chrox/fix_869

fix #869
Merge pull request #1097 from Frenzie/master

Implement UIManager:unschedule(action). Fixes #1007.
update base

fixes #1098 (hopefully)
Merge pull request #1100 from hwhw/master

update base