Refactor: Start to extract IssuesController#edit into #update (REST).
Reduces spacing on the bulk edit form.
Bulk edit refactoring.
Move hardcoded calendar images to css classes.
Fixed view_issues_move_bottom hook arguments (#4893).
Refactor: Extract Issue#bulk_edit from the IssuesController
Moved the IssuesController routing tests to an integration test.
Avoid unnecessary SQL queries when loading changesets.
Memorize commit authors to speed up changesets loading.
Adds a missing index (speeds up changesets loading).
