Modelbaker

- fix ilidata.xml parsing on title element

- The possibility to disable validation on import / export is provided again.
- Do not pass a dataset on import when it's not requested
- Allow to drop XML files on the source selection page
- Don't add unused models from the parsed XTF to the import list

- Fix weird dialog order in MS Windows
- Default CRS is 2056 instead 21781
- Update configuration change in ili2db command sessions when "going back" in wizard
- Wizard GUI improvements

- pass `iface` to Wizard to be able to generate QGIS projects

- Supports XTF model parsing on multiple lines.
- The strange window order (on MS Windows) introduced with 6.6.2 is reverted to the status before.

**Known issues:**
- The settings are not updated in wizard when going back 561
- Wizard dialog don't stays in front on MS Windows 564

- Dataset combobox stays stable on unexpected data sources (like an xtf file).
- Drop of multiple files (including ili-files) in QGIS opens source selection page in wizard.
- File list in source selection page supports drop of multiple files.
- Check the export-configuration instead of the import-configuration on export if there has been a basket handling.
- Wizard dialog stays always in front of QGIS.
- Only check the models in the import model list when same named models are not checked already.
- Only pass models as list in the same session/ili2db command when they are contained in the same ili file.
- Smarter parsing for models in xtf.
- Do not create nm-relation direct relation editor when already a relation_editor to the linktable has been created (because it's not a pure link table but with attributes instead).