Properly block the edge also for touch screen edges
There was a regression introduced with bug fix eec6afe6 which added
a for pointer events only check also to doUpdateBlocking. Do to that
the edge blocking mechanism didn't work for touch edges.
verified with xwininfo that there is no longer a window when
in full screen. Activated edges through touch and pointer
Subscribers: plasma-devel, kwin
Differential Revision: https://phabricator.kde.org/D6304