3bc15c097c
If the redo panel was made visible with the same size it had before (e.g. stored in the file), the runtime region coordinates wouldn't get set and ended up being all 0. E.g. the simplest way to cause this was having a collapsed HUD, saving the file, re-opening it with the same effective DPI and doing an operation so the closed HUD would appear again. Now the size is always recalculated if the visibility state of the HUD changes.