### Steps to reproduce

1. Go to in-app notifications

2. See a notification Begin of the insertionforEnd of the insertion Begin of the deletion that includesEnd of the deletion a Begin of the insertionwork package where you were @mentioned before, and now receiveEnd of the insertion Begin of the deletion  date-alert as well asEnd of the deletion a Begin of the insertiondate alert for itEnd of the insertion Begin of the deletion mentionEnd of the deletion


### What is the buggy behavior?

_Please describe the bug in as much detail as possible. Example:_

* The notification shows the time of the date alert and, next to it, the name of the person that mentioned me

* This looks confusing as it seems like the person mentioned me at the time of the date alert. Example: "10 hours ago by Birthe Lindenthal"


<img class="op-uc-image op-uc-image_inline" src="/api/v3/attachments/139157/content">

### What is the expected behavior?

_Describe how the application should behave like. Example:_

1. Begin of the insertionIf the newestEnd of the insertion Begin of the deletion TheEnd of the deletion notification Begin of the insertionis a date alert, itEnd of the insertion only shows the date alert, like it does in the mail I received


### Environment information

**OpenProject installation type**

* [x] OpenProject Community

**Browser**

* [x] Chrome