* Fixed translations
* Reference objects can now use whole file contents instead of having to choose a part
* Support for DXF files
* Support for IFC files (if NativeIFC is available)
* General code cleanup
Uses new material system for appearance
Each feature object now has a property called ShapeMaterial that
describes its physical properties. If it has a shape, it has a
material.
The ShapeColor attribute is replaced by a ShapeAppearance attribute.
This is a material list that describes all appearance properties, not
just diffuse color. As a list in can be used for all elements of a
shape, such as edges and faces.
A new widget is provided to allow the user to select materials in a
consistent fashion. It can also launch the material editor with its
more advanced capabilities.
Additionally 2 Arch_Window bugs were fixed:
* If the W1 value was changed the box tracker was not repositioned relative to the cursor.
* The WindowColor was not applied because of a typo in the code. De current default color is quite dark BTW.
Note that all dimensional values that were not really defaults, but just the last entered values, have been removed from preferences-archdefaults.ui. As a result the layout looks a bit strange. That will be improved in a next PR.
Since Py3.11 the methods names __setstate__ and __getstate__ conflict with the method names added to the object class.
Thus rename them to 'loads' and 'dumps'
Following the example of Arch_Wall:
- Fixed object name.
- Default label is translatable.
- Name argument should only be used for the label and not be translated.
