Clean up code around commit mentions.

Builds upon !527 (merged).

Added 4 commits:

• 364d547c - Fix for snippets.
• 072113a7 - Clean up code around commit mentions.
• 5a6f6b3f - Include snippet author in recipients of snippet note notification.
• 3e119a6e - Only send note notifications to people accessible by the note author.

Added 15 commits:

• 3e119a6e...80097606 - 10 commits from branch master
• efe96293 - Fix Mention notification level.
• b73ffbd3 - Fix for snippets.
• 959ebbca - Clean up code around commit mentions.
• 7633d602 - Include snippet author in recipients of snippet note notification.
• c644dd01 - Only send note notifications to people accessible by the note author.

Added 1 commit:

• a9b04c45 - Fix Snippet#participants.

Added 1 commit:

• 990b476f - Fix notification service spec.

Reassigned to @dzaporozhets

Added 1 commit:

• 630e8790 - Clean up code somewhat.

@dzaporozhets Code is cleaned up. Doesn't need to go in 7.10 per se.

Milestone changed to 7.11

Status changed to merged

mentioned in commit a4006a6b