push one or all comments into a list

- push all new comments in a special list
- push one comment

When the user pushes a comment:
- the comment inside the editor will change to this format
  - `// {{cardId}} {{comment}}`
- comments with `@username` will be interpreted as add member `username`
- Cards which has been pushed as a comment have a special function
  - you can use `Shift+Click` to jump to the comment in the file 
  - you can use `Click` to jump to the normal tasks-tab

Future:
- When the user deletes a comment which was already pushed he should see a dialog
  - move this card to lists (parameter lists)
  - archive this card
  - do nothing