the only way to ensure the view won't randomly become black
(probably QQuickwidget won't be fixed in qt anytime soon or
ever in 5.x lifetime due to how architecturally is)
basically systemsettings has no control of what gets loaded in,
if one other kcm will call winId(), this one will break.
BUG:341971
KNewStuff is no longer hard-coded to Aurorae themes. Instead the
availability of KNewStuff is derived from the available plugin
metadata. If the section org.kde.kdecoration2 contains a key
"KNewStuff" it's value is interpreted as the knsrc config file name.
If there is at least one plugin with such a key KNS gets enabled.
If there are multiple plugins providing KNS support the download
button is turned into a button with a connected menu and each menu
entry points to one of the available resources. Of course this is
not optimal, but KNS doesn't allow the combining of multiple config
files.
* Border Sizes
* Close menu double click
Both are added to the Settings and exposed in the decoration kcm.
As it started to no longer scale the kcm uses a ui file.
Still missing:
* buttons
* custom decoration configuration
* GHNS
* search
