Revert "Add context action bar on FolderList activity." - We are not ready for this

sort of future yet ;)

This reverts commit a5b8ce80.

Conflicts:
	res/drawable-hdpi/ic_action_read_light.png
	res/drawable-ldpi/ic_action_read_light.png
	res/drawable-mdpi/ic_action_read_light.png
	res/drawable-xhdpi/ic_action_read_light.png
	res/menu/folder_context.xml