editor.css is no longer used

[robbieaverill]

In SilverStripe 4.x the simple theme is not enabled for HTMLEditorConfig any longer, so the rule in the file is not applied to TinyMCE instances in the CMS any longer:

/**
 * This support file is used to style the WYSIWYG editor in the CMS
 */

@import "typography.css?2";
body.mceContentBody{font-size:13px;}

We may consider either removing the file or re-enabling it again.

[dnsl48]

the rule in the file is not applied to TinyMCE instances in the CMS any longer

Even if the CMS doesn't use it anymore, removing this would be a breaking change though?
I guess 3rd party projects still might be using it in some ways.