Pull Request resolves # .

• I read the Generative AI policy and my contribution is either not created with the help of AI or is compatible with the policy and GNU/GPL 2 or later.

Summary of Changes

The new version of choicesjs introduced several changes in the CSS. This PR addresses a z-index problem in select fields in the frontend.

Testing Instructions

Create a new article in the frontend(!) on a website using Cassiopeia template. Go to Options and click on the Category field. You need to play with different display sizes since the effect is noticeable when the dropdown opens to the top. In this case the dropdown disappears in part under the header of the site and you can't see all categories.

Actual result BEFORE applying this Pull Request

The dropdown is partly hidden:

The z-index set in Cassiopeia is overwritten by a more specific definition:

Expected result AFTER applying this Pull Request

The dropdown is always and completly visible:

Link to documentations

Please select:

• Documentation link for guide.joomla.org:

• No documentation changes for guide.joomla.org needed

• Pull Request link for manual.joomla.org:

• No documentation changes for manual.joomla.org needed