Code review comment for lp:~matzipan/scratch/folder-manager-improvement

Just realized that SourceList headers are not visible when they have no children. I don't think there's anything I can change about that.

I will add a check against this.

I've spent 3 hours on the issue "when a new folder or file is created, it only shows the editable entry for a short time.". I could not tell why this is happening. I added a Idle.add() workaround and it worked like this.

Dan thinks this merge request is too large. Unfortunately, I don't think I can break this down into smaller chunks - I don't wanna be committing something I know wouldn't work. And I cannot get it smaller.