Drag and drop focus doesn't allow keyboard

[travankor]

Describe the bug
Changing focus with drag and drop does not send keyboard input to the view.

To Reproduce
Steps to reproduce the behavior:

1. Drop a url into a terminal (terminal takes focus)
2. Type something
3. Terminal has no input

I also have focus-follow with raise_on_top = false

Expected behavior
If a view is focused after drag and drop, then the view should receive keyboard events.

Wayfire version
0.6.0

[ammen99]

Probably we need to update cursor focus on drag end, because wlroots holds a grad behind the compositor's back.

[ammen99]

This is a bug in follow-focus. It only updates focus on pointer_motion and checks the cursor focus view, but during drag-and-drop and similar operations the cursor focus remains on the old view until the drop event. In general the cursor focus can change on many occasions which is why I am adding a new event in PR WayfireWM/wayfire#2335, but follow-focus will have to be adapted to use that signal.