Cant select Folded Tracks, blocks navigation in device control view

[MrMatch246]

When changing the selected track in device control view, trying to access a folded track throws an (internal) error :

2023-08-17T16:23:31.892054: error: RemoteScriptError: self.song().view.selected_track = self.song().tracks[self.selected_track_idx - 1]
2023-08-17T16:23:31.892085: error: RemoteScriptError:

2023-08-17T16:23:31.892113: error: RemoteScriptError: RuntimeError
2023-08-17T16:23:31.892139: error: RemoteScriptError: :
2023-08-17T16:23:31.892165: error: RemoteScriptError: The given Track is invisible

It is possible to select the group but any further clicks fail. preventing someone from accessing tracks on the other side of the group.

I assume the wanted behavior would be that we keep the track folded and just select the next possible, unfolded track.
auto opening these sections might be confusing to the user.

[hdavid]

fixed in #81