Add a distinct window for replying with preview function

[Ziz]

The editor is not WYSIWYG, but WYSIWYM (what you see is what you mean). Especially quotes look very different in the editor compared to the final post.

 

[EvilDragon]

It's a standard CKEditor, if someone knows how to fix it, it would be great...

However, the next version of IPB (v4.1), coming in October, has a lot of changes and improvements on the editor.
They run that version on their own customer support forum site already, and quotes look normal and work properly there!

So we probably should just wait for that fix