Vlad Zahorodnii authored Jul 21, 2020 and Roman Gilg committed Sep 22, 2020

Unfortunately, a0c4a8e766a2160213838daf6f71c7ae6c3705df has a major bug
where clients that track focus events may get confused by focusToNull().

One such a notable example is Dota 2. It tracks the focus events to
minimize itself after the keyboard focus has been lost as well stop
playing music while it's in background. So, when we call focusToNull(),
Dota 2 will receive a corresponding FocusOut event and ask the window
manager to minimize it. It doesn't really matter that the FocusOut
event is going to be followed by a FocusIn event because when a window
is minimized, kwin will activate the next one in the focus chain.

Since those issues can't be fixed from the window manager's side, this
patch partially reverts a0c4a leaving only the autotest.

BUG: 424223
FIXED-IN: 5.19.4