When assigning containers, ensure aggregates and containers are mutua…

…lly exclusive

Test edit object placement. See IfcOpenShell#1711

Optimise create owner history to not rely on a person and organisatio…

…n lookup, speeding up long procedures

Fix bug where you could accidentally add a context other than what yo…

…u selected in the UI

Add support for null attributes for people, roles, and addresses. New…

… prototoype testable architecture. See IfcOpenShell#1711.

Prevent using pset operators when no template available

Fix error when displaying a selected but inactive object's properties…

… with the pin feature

Remove need for IfcConvert since we can drawing is now part of v0.7.0.

Fetch pytest-blender dependencies (IfcOpenShell#1746)

* Fetch pytest-blender dependencies

* Fix command location

Fix error when filling has no IFC type