--the previous approach was disabling the background
contrast effect at all times except when the background
opacity was 100%, the new approach considers the background
opacity value and provide mid values to be applied.
That means that 0% background opacity disables the background
constrast visual effect, 100% applies the background contrast
visual effect at its maximum values and in between the mid
values for background contrast effect are applied
--following plasma approach and use always
even for !compositing mode the widgets/panel-background
svg file. This way when Latte and Plasma panels are
combined there is uniformity between them.
BUG: 406597
--now config windows are masked properly in order to
accessible to all of their areas. By design the config
windows are trying to be below the main view, this is
why masking is needed in order to work properly and not
having areas that can not be clicked/accessed because
of the top Latte View
Michail Vourlakos