Can no longer copy content from code blocks

[nickvergessen]

Describe the bug Ref https://github.com/nextcloud/text/pull/5212

To Reproduce Steps to reproduce the behavior:

1. Have a collective page with a list and inside the list there is a code block:

* List item 1
* List item 2
    ```
    ### Workarounds
    
    <!-- Remove not applicable sections -->
    
    * Disable app X
    * Change config setting Y
    * No workaround available
    ```

2. Copy bits inside the code block
3. Paste any where

Expected behavior You paste:

### Workarounds

<!-- Remove not applicable sections -->

* Disable app X
* Change config setting Y
* No workaround available

Actual behavior You paste with list item and code block wrap

Screenshots If applicable, add screenshots to help explain your problem.