Cycle through Tabgroup
I think it would be nice if clicking (again) on the tile mode buttons would cycle through (or switch) positions of the tabs in the tabgroup. Or a context menu item in the tab header that does something like it.
For example: if you have 2 tabs stacked and in split mode the tabs switch positions if you click on the mode button:
I often end up with stacked tabs in the wrong order. Such an option would make it easier to correct/change it.