"Rebase before merge" checkbox is gone from MR accept widget in EE

(This is an EE issue, but I'm posting it here so it can go in the regressions thread)

The MR accept widget was refactored in CE, and the checkbox went missing when CE was merged into EE.

This is the now-missing piece of code:

- if @merge_request.target_project.merge_requests_rebase_enabled && can_rebase?(@merge_request.target_project, @merge_request.target_branch)
            .accept-control.remove_branch_holder
              = label_tag :should_rebase, class: "checkbox" do
                = check_box_tag :should_rebase, "1", @project.merge_requests_rebase_default
                Rebase before merge

cc @dzaporozhets

mentioned in issue #1810 (closed)

@DouweM awesome that you found it. I will fix it and we put it into RC3. cc @jacobvosmaer

Fix at https://dev.gitlab.org/gitlab/gitlab-ee/merge_requests/425

Status changed to closed

Fix has been accepted :)

Mentioned in commit pfjason/gitlab-ce@a56516b6

mentioned in merge request !14785