GDK-Win32: Fix glitches when using EGL/ANGLE

We need to force redraws of the whole window when we are using EGL/ANGLE
during maximize, restore and Aerosnap ops so that we do not get glitches
in the resulting window.
1 job for <span class="ref-name">wip/gtk322.win.egl</span> in 9 minutes and 13 seconds (queued for 3 seconds)
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passed #43911
build

00:09:13