Kirigami upgrade to 2.2

[Jan Mulder]

Hi Marco, and list,

Trying to upgrade the Subsurface-mobile code to use Kirigami 2.2, I'm 
stuck on one subject. We currently do a set of the following color 
assignments (from our main.qml):

Kirigami.Theme.highlightColor = Qt.binding(function() { return 
primaryColor })

As this is not possible any more in 2.2 (setters are now protected and 
not accessible from QML any more), it seems we need to re-implement some 
things, but I have difficulties understanding the colorSet and Theming 
factory changes (or finding proper manuals for it).

Could you provide some guidance on this final hurdle to get all our QML 
stuff on 2.2?

--jan