#11 SA_Quiet doesn't hide the title bar

[Matthias Rustler]

OpenScreen tag SA_Quiet is documented as:
"Intuition will not render system screen gadgets or screen title."

On AROS the title bar is drawn which is quite annoying for e.g. screen
blankers.

I'm not sure how to solve it. openscreen.c has this comment:

//jDc: ALL screens MUST have BarLayer!
CreateScreenBar(&screen->Screen, IntuitionBase);

CreateScreenBar creates a layer for quiet screens with
CreateBehindHookLayer(). Is that wrong?