Fixed that views could be stuck transiently at times

Removed all references to overlay from the stackscroller
and always using transient views now. We were using
the overlay in places where we shouldn't have been and
therefore views could become stuck.

Change-Id: I8bf455e2d1c4d065d0b3c441606d51b3b96eab9f
Fixes: 78493499
Test: add hun, click on it, observe no transient view stuck behind