Merge branch 'release/Massive_and_thinwalled_in_drawing'
Empty holder classes
Open by filetype
Merge branch 'hotfix/Open_by_filetype' into develop
Visualization works in its simplest form
Need to create a complete deep copy structure for entities to continue.
Adding missing files that got renamed
Fixed connection between left and right panel in dimension dialog
Save changes not working.
Entity deep copy pattern, and visualization/redraw seems ok. Need to change node storage to a shared list.
Merge branch 'feature/DimensionDialog/Visualisation' into develop
Merge branch 'develop' into feature/DimensionDialog/Edge_materials

Conflicts:
	UserInterface/DimensionDialog.cpp
Material data model, population and selection in dimension dialog