Rebases trigger noisy, uninformative messages

When a merge request is rebased using the nice GUI button or on the command line, two things happen:

• Everyone gets a useless email saying, "Such-and-such added n commits" with a list of commits unrelated to the merge request
• The Overview tab gets a similar useless entry:

Neither of these are useful, IMO, as they are displaying information not related to the merge request without even describing the action that was performed (rebasing).

I would recommend either not sending these emails or displaying entries in the Overview tab, or at least improve the display to instead say "such-and-such rebased the merge request" and omit the list of commits