[qt] Remove QEvent::Polish from titlebar filter to fix Applets tab (#3644)

Reviewed-on: https://git.eden-emu.dev/eden-emu/eden/pulls/3644
Reviewed-by: MaranBr <maranbr@eden-emu.dev>
Reviewed-by: crueter <crueter@eden-emu.dev>
Co-authored-by: PavelBARABANOV <pavelbarabanov94@gmail.com>
Co-committed-by: PavelBARABANOV <pavelbarabanov94@gmail.com>

src/yuzu/main_window.cpp

@@ -220,7 +220,6 @@ struct TitlebarFilter final : QObject {
             case QEvent::WinIdChange:
             case QEvent::Show:
             case QEvent::ShowToParent:
-            case QEvent::Polish:
             case QEvent::WindowStateChange:
             case QEvent::ZOrderChange:
                 ApplyDarkToTopLevel(w, dark);