After a bit of experimenting with parasite, it seems that as a workaround, you could hide and show the bottom HBox after you switch tabs, and that forces re-layout of the widgets.
It doesn't seem to work if you do it before switching tabs.
After a bit of experimenting with parasite, it seems that as a workaround, you could hide and show the bottom HBox after you switch tabs, and that forces re-layout of the widgets.
It doesn't seem to work if you do it before switching tabs.