[refactor] Factor out commit list from compare and new MR.
Created by: cirosantilli
The exact same piece of code was copied twice.
Besides those, there is also a third very similar copy which has started to diverge for the merge requests show view at: https://github.com/gitlabhq/gitlabhq/blob/174c00cf2c026a3bdc61d94b45195a5e5c99202f/app/views/projects/merge_requests/show/_commits.html.haml#L6 . It has diverged as it now:
- has a list icon
- hides to 8 items on page load
I propose all of those 3 cases be made the same. If not, at least we should further refactor part of the MR show with the other 2 occurrences.
Just to show clearly what is the object in question:
