Feature request: Possibility to add internal comment(s) to a single report entry

[paraenggu]

During a time report one has to enter a comment which explains the work that has been done related to a single entry. This comment is often used in a regular work rapport which is sent to the customer.

It would be helpful if the reporter and the reviewer can add an additional internal comment (ideally multiple) to a single report entry. This would be useful to add internal notes or references which shouldn't be displayed in the main report comment, but must be preserved for later controlling tasks or to answer customer enquiries after the report has been sent.