Windows: Reevaluate dark frames if the application palette changes

Since 5ea7e3a8111b2939f0c91b750aa1c62ab16ab715 we are using dark window
frames if the default palette is dark, unless applications explicitly
override dark frame support.

If the palette changes during runtime, we didn't reevaluate that
setting. Do that by handling ApplicationPaletteChange events in
QWindowsWindow. We still have to respect an explicit opt-out.

Simplify the code at the call sites of setDarkBorder(), we don't need
to check all the time whether the application has opted out of dark
frame support.

Pick-to: 6.4
Task-number: QTBUG-72028
Change-Id: I94e7d33cd21f9656ca210b43e775f487abc25b54
Reviewed-by: Tor Arne Vestbø <tor.arne.vestbo@qt.io>

0 files changed, 0 insertions, 0 deletions