In Neos 7.3.17 and before the placeholder in ckeditor would not disappear when focused. And only when typing. By switching to the native placeholder feature of ckeditor in #3558 we introduced a regression as that implementation would hide the placeholder while just clicking into.
This is especially noticeable for centered texts as the cursor needs one millisecond to adjust and its glitchy.

 This will eventually be fixed in Ckeditor 24 something. As a hotfix for our version 16 i introduce the patch of ckeditor/ckeditor5#8474 (without the css absolute change as that would make centered text uneditable). The mentioned fix was not merged directly into ckeditor but made way more complicated: ckeditor/ckeditor5#8867
 We dont need the more complicated fix as we dont use the mentioned features of the placeholder in a image description and such.

To move the cursor to the first position, the placeholder text is moved backwards. Therefore, a change with a break is disadvantageous.