### Steps to reproduce

1. Go to in-app notifications

2. See a notification that includes a  date-alert as well as a mention


### 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. The notification Begin of the deletion either

1. End of the deletion only shows the date alert, like it does in the mail I received Begin of the insertion


End of the insertion Begin of the deletion

2. or, if the mention is &quot;unread&quot; as well, it divides both information, e.g.: &quot;date alert 10 hours ago | mention by Birthe Lindenthal&quot;

1. ideally, I would like to see the date of the mention as well


End of the deletion ### Environment information

**OpenProject installation type**

* [x] OpenProject Community

**Browser**

* [x] Chrome