* BIM: improve unit handling in Arch_Roof task panel
Fixes#21137.
Improvement for #21175.
units are now kept when a cell receives the focus.
Additionally:
* The first and last column have been made read-only.
* Some columns have been widened.
* The text in the task panel has been reordered to match the order of the columns.
* _RoofTaskPanel_Delegate class only if Gui is up
* typo
Fixes#19013.
* Check direction of plane axis with a tolerance.
* Check the produced solids. Notably check for a min. volume. Required for solids created from non-planar faces.
* Apply placement to created compound.
