Some window managers have trouble moving fullscreen windows to another monitor. For example, KWin
doesn't allow moving windows with _NET_WM_STATE_FULLSCREEN set. FVWM used by TestBots keeps
the size for fullscreen windows after they are moved to another monitor and when the window is also
fullscreen on the new monitor, which could be a bug in FVWM. But let's work around this in the tests
as well. The changed tests don't need created windows being fullscreen at the start.

Wine-Bug: https://bugs.winehq.org/show_bug.cgi?id=54172