Use Navigator to control project structure

The Navigator view is core element of the UI project creation. However, the current implementation has some flaws.

​

Identified in the 3D First POC, the navigator should be more expanded

• All add/remove quick/quick3d components should be done from the Context menu:
  • Context menu should have different locations for 2D and 3D
  • Add 'Add..' button to the menu toolbar which has the Context menu items as well
  • Components are coming from libraries, not static configuration: https://qt.productboard.com/products/features/30300279/detail
    (Need to discuss with bubke about having the components meta info/sheets in qt creator repo, is it permanent?)
• Navigator changes
  • Child objects are seen on the tree-view, component editing does not have to be invoked separately (requires further discussions)
  • Color code the nodes icons based on their type (3d, 2d, etc.)
  • Get rid of projects view and show all files in the assets view (with filters to show specific files types) (requires further discussions)
  • If objects are references (such as materials), the references are shown on the navigator (requires further discussions)
• Show materials and user components in the assets view (requires further discussions).
• Show materials and textures properties in the property view and get rid of material and texture editors.
  • add a locking feature to property view (when locked, it always shows the properties of the current node and doesn't react to node selection change).
  • allow opening more than one property view.

Miro board link: https://miro.com/app/board/uXjVKmUkMao=/ Password: DesignStudio5