Move changeset show action to changesets controller
Merge remote-tracking branch 'upstream/pull/4272'
Rename path for changeset API subscription methods
Merge remote-tracking branch 'upstream/pull/4463'
Link to current and old element versions from changeset pages
Move element title to changeset/relation list item
Add element list item helper
Separate element strikethrough from classes
Apply changeset element classes to list items
Move previous/next user's changeset links to bottom
Show api error message if failed to (un)subscribe
Remove duplicated code from changeset comments list
Simplify moderator check when showing changeset comments
Remove hidden comments test from controller tests
Turn hide/unhide comment controls into buttons
Test notices of disabled changeset commenting
Use svg icons in previous/next changeset links
Call paging heading helpers from partial
Avoid wrapping friendly_date with abbr tags
Make change set comment rate limit errors display properly Fixes #4320