After updating a work package in modal view from Backlogs, saved changes are not updated at once.

### Preconditions:

- Backlogs module is activated
- There is an active version displayed in Backlogs and a work package assigned to it

### Steps to reproduce:

1. Go to **Backlogs**
2. <ins>Click on</span> the work package <span class="underline">ID</ins> from any version in Backlogs \> Work package is opened in modal view
3. Click **Update** \> Click on **More**
4. Change <ins>type, title, status, story points</ins> \> Click **Submit**
5. <ins>Close</ins> modal view

### Actual result:

- Saved changes are not updated at once and the old data can be seen in the Backlogs
- The changes are updated only after refreshing the page

### Expected result:

Saved changes should be changed immediately, without reloading the page

### QA System:

https://openproject-org.qa.finn.de/
https://test-myproject.telekom.de/ite1/ Begin of the deletion
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