This removes the need to take screenshots of icons.
- Add icon source directories for the .qdocconf file
- Remove screenshots of icons from doc\images (except completion
- Copy images that do not have unique names from src or libs
- Create images that use overlays and update them in docs\images
- Fix paths and filenames in \inlineimage commands
- Fix text where one screenshot was replaced by two icons
Reviewed-by: Alessandro Portale <email@example.com>