what that does - the general application color scheme applies to the native
widget and any Plasma::Theme overrides are applied on top of that making it
slightly less native looking and more plasma-themed.
also that allows to not just hide the calendar month button but disable it,
the colors for disabled widget as slightly lighter than the usual color
scheme so its not a big difference visually with that change
Signed-off-by: Ivailo Monev <xakepa10@gmail.com>
