Create assembly enhancements (host all elements especially 'Curtain wall' and Library content/access)

[WM_Ron_Allen]

Allow "Assemblies" to host Curtain walls, grids, mullions and all other components.

Assemblies cannot currently host curtain wall assemblies. These assemblies can be used for exterior elevation variations for many different uses - like Curtain window configurations reused, exterior elevation content that is repeated, tilt up construction, etc.

Also:

• When creating an assembly -internalize a 'relative origin' for the assembly drawings independent of the World coordinate system. Currently moving the assembly will break all the sheet layout for assemblies.
• Allow assemblies to be duplicated and modified
• Allow assemblies to remain after the last assembly is deleted
• Allow saving of assemblies
• Allow limiting of allowable flip controls (Left/right, Front/back, Rotate180)

@sasha.crotty  - not sure why assemblies and curtain walls don't behave wall together. We can host the curtain wall but not the grids and mulls.

[JDuncan-FND]

Or at the very least allow the other basic modify tools like trim, offset, etc to work on detail lines while working within assemblies