Fix Aurorae window decoration buttons double click
The Aurorae window decoration buttons don't work correctly because 4881dd63 changed the way double clicks are handled. The code relies on QMouseEvent::timestamp
to check if a mouse click is a double click but QMouseEvent::timestamp
always returns zero.
Passing the timestamp from the input layer to the QMouseEvent
makes the double click work correctly.
This fix has been tested on Wayland and X11.