I've made it at least mark unusable free space as such, so that you have some kind of visual hint. A tooltip with more information would be nice, but that's going to be tricky until better support for tooltips in treeviews is added in a future release of GTK.
I've made it at least mark unusable free space as such, so that you have some kind of visual hint. A tooltip with more information would be nice, but that's going to be tricky until better support for tooltips in treeviews is added in a future release of GTK.