gtkwindowhandle: Only claim gesture on action

gtkwindowhandle: Only claim gesture on action

The press gesture does not need to set claimed state just for n-press
tracking, it will however reset all other click gestures on each press
if the event gets propagated all the way up.

Fixes tracking of multi-press in gestures in widgets that are children
of the window handle. E.g. the headerbar listview in the "File browser"
gtk4-demo demo.