artist versions: rearrange layout to better fit small screens.

* Move group name beneath the artist name.
* Replace 'Active' column with '(deleted)' notice next to artist name.
* Combine updater, updated at, and ip address fields in single column.
* Combine templates for standard listing and revert listing (only
  difference is presense of 'Revert to' column).

app/helpers/artist_versions_helper.rb

@@ -1,4 +1,8 @@
 module ArtistVersionsHelper
+  def artist_versions_listing_type
+    params.dig(:search, :artist_id).present? && CurrentUser.is_member? ? :revert : :standard
+  end
+
   def artist_version_other_names_diff(artist_version)
     new_names = artist_version.other_names
     old_names = artist_version.previous.try(:other_names)