Mark notifications as read when you read unread messages

[Spuds]

Hopefully, does what is says. If you read unread messages, that have notifications, they will automatically be marked as read.

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 43.52%. Comparing base (796ece4) to head (61ad7a2). Report is 6 commits behind head on development.

:exclamation: Current head 61ad7a2 differs from pull request most recent head 8e3750d. Consider uploading reports for the commit 8e3750d to get more accurate results

Additional details and impacted files

```diff @@ Coverage Diff @@ ## development #3796 +/- ## ================================================= + Coverage 43.38% 43.52% +0.13% - Complexity 13910 13913 +3 ================================================= Files 348 348 Lines 74774 74823 +49 ================================================= + Hits 32442 32565 +123 + Misses 42332 42258 -74 ```

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