When resuming from suspend, I get 5 "new pointer" and 5 "new keyboard"
events (on a laptop with USB mouse/keyboard, but also stuff like
"Thinkpad Extra Buttons" adds more notifications than one would expect)

KGlobalAccelImpl::x11MappingNotify is still called 15 times, but
that's better than 145 times...

"new pointer" notifications end up calling `kcminit mouse`, better
also compress that.

(cherry picked from commit 199cad52)