Previously it was saved using Windows 1252 and importing it would fail with an error like so:
```
UnicodeDecodeError: 'utf-8' codec can't decode byte 0x92 in position 650: invalid start byte
```
Because apparently it's not invalid IFC.
IfcStructuralPointConnection documentation says that they should have a topology representation with a IfcVertexPoint but it doesn't restict this representation from having Undefined type if it does have a IfcVertexPoint as it's item.
I can't figure out a more elegant way of doing this. I.e. I don't know
how to detect whether or not the user has explicitly set their own snap
default.
There's now operator to check that all profiles, styles, materials in the current project have a unique name. Which is important since it's used when we append assets to ensure there are no duplicated assets.
Operator location - https://i.imgur.com/bvXjZ8Y.png
Example output:
```
IfcMaterial name 'KnownUnknown' is used by multiple assets:
- # 260=IfcMaterial('KnownUnknown',$,$)
- # 1220=IfcMaterial('KnownUnknown',$,$)
Found issues validating IfcProfileDef assets.
IfcProfileDef name 'DEMO-C' is used by multiple assets:
- # 266=IfcCShapeProfileDef(.AREA.,'DEMO-C',$,0.2,0.1,0.0015,0.03,0.005)
- # 261=IfcIShapeProfileDef(.AREA.,'DEMO-C',$,0.1,0.2,0.005,0.01,0.005,$,$)
Found issues validating IfcPresentationStyle assets.
IfcPresentationStyle name 'Frame' is used by multiple assets:
- # 363=IfcSurfaceStyle('Frame',.BOTH.,(# 362))
- # 1221=IfcSurfaceStyle('Frame',.BOTH.,(# 1222))
```
I'd much rather not expose this option to ifcpatch but I guess models are different and there should be a way to extract elements even if assets name uniqueness is not ensured (since it's not IFC requirement anyway). But it may cause duplicated assets.
Set style name explicitly, this way what user does in UI is what they get in IFC.
Previously confusingly if you set style name to "Glass" and "Glass" already existed, you would get "Glass.001" style internally but "Glass" name in UI.
Just to make sure user will set what was actually saved to IFC right away. To prevent confusion when they see it only after model was reloaded completely.
The problem was that during class assignment, it was setting the object name and `is_renaming` flag but only then linking to IFC. Since object wasn't linked to IFC, name callback wasn't triggered and `is_renaming` wasn't reset and first rename wouldn't work.
Now it's just not setting the flag if object is not linked to IFC, as there's no callback then and don't need to protect from it.
Andrej730
