Small tweak to the object context menu.
Currently, the object context menu includes a couple of inconsistencies between object types. This is a small patch that fixes these.
- Adds the same ability to Join and Set Origin to all supported object types
- Adds Set Active Camera for cameras
- Adds Adjust Stroke Width for GP Objects
- Adds Trace Image to Grease Pencil for Image Empties
- A number of naming changes for consistency and clarity
- Use 'Adjust...' for all entries that adjust properties rather than being normal operators
- Follow naming conventions (ie Draw -> Display etc)
- Less naming ambiguity and more correctness and consistency