Need help/ideas:
A better way to hide the separator (see Header.qml).
Have a problem to disable highlight of List Item when holding the mouse button. (Highlight when hover makes harder to read IMO.)
I've added 3 lines with a // TODO Fix bind loop messages for width. for 2 pre-existing issues. I tried to solve them, but failed. Note sure if they have place in code.
Thoughts on the layout.