Merge branches 'new_ui_code' and 'new_ui_code' of github.com:houqp/kindlepdfviewer into new_ui_code
Merge branch 'new_ui_code' of github.com:hwhw/kindlepdfviewer into new_ui_code
Merge branch 'new_ui_code' of github.com:hwhw/kindlepdfviewer into new_ui_code
Merge branch 'new_ui_code' of github.com:hwhw/kindlepdfviewer into new_ui_code
Merge branch 'new_ui_code' of github.com:hwhw/kindlepdfviewer into new_ui_code
add close button toggle for menu widget
add calling item.callback() as default onMenuChoice action
add menu to FileManager
Merge pull request #733 from houqp/new_ui_code

add menu to filemanager