Fix #6501. Fix #6104. Fix #6189. You can now change wall offset convention after drawing walls.

People kept on getting confused with the align tool thinking it changed
the baseline to reference line offset whereas it actually just aligned
the object bodies. This tool now does exactly that.

Also start refactoring the "DumbWall" classes into the tools so we can
test them properly.

src/bonsai/bonsai/bim/module/model/slab.py

@@ -36,7 +36,6 @@ from math import cos, pi
 from mathutils import Vector, Matrix
 from bonsai.bim.module.model.decorator import ProfileDecorator, PolylineDecorator, ProductDecorator
 from bonsai.bim.module.model.polyline import PolylineOperator
-from bonsai.bim.module.model.wall import DumbWallRecalculator
 from typing import Optional
 
 
@@ -1035,5 +1034,5 @@ class RecalculateSlab(bpy.types.Operator, tool.Ifc.Operator):
                     if rel.is_a() == "IfcRelConnectsElements" and rel.RelatedElement.is_a("IfcWall"):
                         walls.append(tool.Ifc.get_object(rel.RelatedElement))
 
-        DumbWallRecalculator().recalculate(walls)
+        tool.Model.recalculate_walls(walls)
         return {"FINISHED"}