A user wants to send a link to a specific message in an issue to another person.

Supporting this requires two changes to the issue.item (task.item etc.)
templates:

  1) add an id element to the message header. For the classic tracker this
      is a 'tr' element, for responsive it's a 'div', jinja2 probably uses
      a 'div' as well. Use the msg designator as the id, so msg32 for example.

  2) provide an 'a' element that can be used to create a link to the id'ed element.