Change how touchscreen regions work slightly... "It modifies the behaviour of touch...

Change how touchscreen regions work slightly... "It modifies the behaviour of touch buttons to be more similar to the way gui buttons operate in desktop applications. Upon a touch press event, the button at the touch position is armed. Upon a touch repeat or release, the button at the touch position is triggered only if it is armed. Upon release (and wps entry), all buttons are disarmed. E.g. when you touch press on an empty area, then while pressing drag your finger on a button, then release the button, the button is not triggered."

Author: Jens Theeß
Flyspray: FS#10982

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@24876 a1c6a512-1295-4272-9138-f99709370657