tdf#98253 Qt5 rely on VCL for SetDeactiveColor

Keep the DeactiveColor from generic vcl style without overriding it
with the Qt5 style.

Change-Id: I10ffdc79e1b6878d27ae13c6394ad50d7470f073
Reviewed-on: https://gerrit.libreoffice.org/64522
Tested-by: Jenkins
Reviewed-by: Jan-Marek Glogowski <glogow@fbihome.de>

vcl/qt5/Qt5Frame.cxx

@@ -837,7 +837,7 @@ void Qt5Frame::UpdateSettings(AllSettings& rSettings)
     style.SetToolbarIconSize(ToolbarIconSize::Large);
 
     style.SetActiveColor(toColor(pal.color(QPalette::Active, QPalette::Window)));
-    style.SetDeactiveColor(toColor(pal.color(QPalette::Inactive, QPalette::Window)));
+    // rely on VCL for style.SetDeactiveColor
 
     style.SetActiveTextColor(toColor(pal.color(QPalette::Active, QPalette::WindowText)));
     style.SetDeactiveTextColor(toColor(pal.color(QPalette::Inactive, QPalette::WindowText)));