Some suggestions:
1. Set Change model position on top
2. When Door or window is checked,
2.1 -in Additional properties table, to be displayed all the properties related to this:
doorOrWindowWallThickness
doorOrWindowWallDistance
doorOrWindowWallCutOutOnBothSides
doorOrWindowWidthDepthDeformable
At this moment became grayed and only if Modifiable is checked in general settings.
2.2 - on the left of table, under the Change model, to be displayed the png WITHOUT sash.
3. Add a new checkbox for Sash.
Sometime is useful for other furniture with doors to see if you could open.
3.1 When checked to add on table the specific properties:
doorOrWindowSashXAxis
doorOrWindowSashYAxis
doorOrWindowSashWidth
doorOrWindowSashStartAngle
doorOrWindowSashEndAngle
3.2 - on the left to be displayed the png WITH sash