Refactor: Extract Query#sortable_columns from the controller.
Fixed: code syntax highlighting not working in Document page (#3740).
Adds text formatting to documents index (#202).
Refactor: Extract method to the Member model
Adds an helper for displaying the 'checked' image.
Do not query the database for project level on projects list.
Accept issue links inside brackets (#4418).
Refactor: Change the different find_object filters to share a common method.
Fixes undefined method 'notes' error from r3594
Removes broken links in wiki syntax help page (#5081).
