Edit proposal targets
Added a TargetList component with an editable table. Features:
- Display proposal targets
- Add new targets
- Delete existing targets
- Edit existing targets
- Resolve a target name to the correct ra/dec format
- Save the final result to the backend
Caveats:
- No error/success messages yet
- No focus on newly added elements
- Need to catch up on testing
- No validation feedback
Edited by Robbie Luijben