Removes useless class.
Replaces 'New category' link on the issue form with an icon.
Add assertion about email notification on issue creation via email (#4228).
Make use of #watched_by? in issue form.
Fixes tracker update on context menu (#2405).
Fixed: "None" category issue count is empty while grouping by category (#4308).
Fixes context menu broken by r3109 (#2405).
Remove duplicate validation.
Adds tracker update to context menu and bulk edit form (#2405).
Enable tracker update on issue edit form (#2405).
