Disable Quick Actions if unsupported
Disable Quick Actions if unsupported

Quick check to disable the quick action button if the device (below 3.0)
doesn't support it. This should be the last change needed for the app to
run on 2.2+, so merging it back mainline now.
AnimeNeko/Atarashii,ratan12/Atarashii,AnimeNeko/Atarashii,ratan12/Atarashii