kwin_wayland's desktop switcher blinks on opening windows

[tsujan]

This is unimportant and may be related to KWin's signals. I report it just not to forget it; might close it later.

On opening each new window, the current desktop button blinks once under kwin_wayland — it's probably unchecked and checked again instantly, although I can't be sure, because it happens in a fraction of a second. There may be more conditions for seeing it though.

Franky, I don't remember if this happened on kwin_x11 too — have no motivation to log into X11 either.

[tsujan]

OK, I didn't have an illusion: it's because of these lines:

lxqt-panel/plugin-desktopswitch/desktopswitchbutton.cpp

Lines 81 to 82 in 30672d1

	style()->unpolish(this);
	style()->polish(this);

The urgency won't be shown without them.

It doesn't depend on X11 or Wayland either. It may just be more visible on Wayland because Wayland is faster — or because kwin_wayland emits a redundant signal?