skip delivery of notifications for orphaned works
3967 Change ARIA roles on autocomplete
change chapter title & subject string building logic for subscription emails; reword email footer text to say 'your donations' instead of 'your support'
Merge pull request #1624 from sarken/issue_3967

3967 Change ARIA roles on autocomplete
Merge pull request #1229 from tuff-ghost/issue_3191

3191: creator subscription email information breaks orphan-anon
Merge pull request #1129 from tuff-ghost/issue_3431

3431: Chapter titles in batch subscription notification emails