###Problem
Current interface still partly QWidgets based. Backend uses C++ objects instead of models.
###Goals
* Rewrite backend as model for outputs
* C++ objects in QML
* Full QML interface with Kirigami controls
* Mobile ready
###Idea:
For mobile ready and nicer design only show the overview if there are more than one outputs connected until user clicks one of the outputs. Then slide up control panel for the output. Flicking left, right on control panel also allows to switch through outputs. Depending on size there is always still a full interactive overview or a miniature version of it.
###Current progress
19-07-12
{F7009910}
19-07-15
{F7024721}
See D22468