Improve Batch Exercise Editing

[MrSerth]

As an instructor, I would like to have a simpler way to edit exercises with fewer clicks than available today. The workflow for new exercises is not perfect yet and involves many manual switches between local files, the implement view, and the edit view.

There are many different solutions that might help, some random ideas which need to be evaluated:

• What about using (a) git repo to push exercises with metadata saved in files?
• What about using a bulk upload feature for multiple files (drag and drop from your file system and only update some minor fields)
• What about using an environment similar to the implement view and a button to set the current status of an implementation as a new exercise?