Clear keyboard modifier state when application deactivates

When the application deactivates while a modifier is held down,
the modifier would get stuck and be set for all subsequent
shortcut events. This could easily happen when nesting a Wayland
compositor inside another compositor and using ALT+TAB to switch
to another application. The alt modifier would then get stuck,
since it never received any release event.

When the application is inactive and then comes back, we can't
know which keys are pressed, so it's better to just assume they are all
cleared at this point.

[ChangeLog][QtWaylandCompositor] Fixed a bug where keyboard
modifiers would get stuck if the compositor was running nested
inside e.g. X11 and then ALT-TAB was used to switch to a different
application. This would cause shortcuts to misbehave.

Fixes: QTBUG-101862
Change-Id: I9645418719d8ef8fc2ce2203ca5b6a159f3d9a7c
Reviewed-by: Paul Olav Tvete <paul.tvete@qt.io>

0 files changed, 0 insertions, 0 deletions