[6.0] Fix tinyMCE dark mode

[dgrammatiko]

Pull Request for Issue #46504 .

Summary of Changes

Respect the existing custom css

Testing Instructions

Actual result BEFORE applying this Pull Request

editor.css is ignored

Expected result AFTER applying this Pull Request

editor.css is NOT ignored, dark/light still functional

Link to documentations

Please select:

• Documentation link for docs.joomla.org:

• No documentation changes for docs.joomla.org needed

• Pull Request link for manual.joomla.org:

• No documentation changes for manual.joomla.org needed

[exlemor]

Hi @dgrammatiko, thank you for your contribution number (too many to count ;) ).

Can you help me figure out what to test specifically for TinyMCE Dark Mode, or specific area of TinyMCE, etc as Dark Mode is a large topic? thank you very much :).

[dgrammatiko]

Create an editor.css in the media/templates/site/cassiopeia/css. Check before and after. The issue is that for dark mode the editor is ignored

[exlemor]

media/templates/site/cassiopeia/css

Hi @dgrammatiko, I'm going to sound stupid but I already have an editor.css file in my media/templates/site/cassiopeia/css ( ( I didn't add it to be clear), it has 96 lines, and it's about 1kb... ?!

or are you saying that whether I create it or it's already there, it's being ignored in Dark Mode?

[dgrammatiko]

As it was reported in the issue in 6.0.1 the file is ignored. Add some thing like a weird background color for the body and check if it is respected