E.g. if you would call this operator for 1 specific cost schedule, Blender would remember it's value and would keep on using it even if operator is going to be called outside this schedule
Mentioned in #6545
Override filename to be always empty, so user won't have an expectation that csvs will be saved as a single file (currently they're always saved to a directory).
To prevent confusion with 'Hierarchy' column that's added on the export and make current and export compatible.
Indices now always start from 1 for consistency.
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.
Andrej730
