GTK widget clickable areas feels broken

[alerque]

The UI in the module selector is usable, but feels broken because the available click targets are not as expected. All this goes for at least the module selector in the sidebar as well as the one in the popup when configuring the parallel view. I don't know if it goes for other GTK tree widgets.

The widget looks like this:

The only mouse interaction that seems to work is a single clink on the label. Clicking on the tree arrow icons has no effect.

The expected interaction would actually be that a single click on the arrow / tree icons would expand/contract the entries, and a double click on the label would do the same thing. Single clicking on the label should select the entry, but not expand/contract it.

I'm using Xiphos version 4.1.0-38-gf965eaeb.

[programmin1]

When you look at this one can you also please consider more height, more spacing to tap on items and tappable area, for all the phones that are going to be running on Linux in the near future - also see #981