Did I forget about something?
Just for the record, I increased the priority of this issue

because as the toolbars grow (e.g. addition of the media-embed dropdown), this issue becomes visible even more.
We also need to start looking for solutions for https://github.com/ckeditor/ckeditor5/issues/894


because if overcrowded toolbars in the classic/document do wrap to the next line, there's no such thing in the balloon editor. And this becomes a problem because no matter what, there's no way to position the balloon to fit the toolbar in the viewport in some situations because it's just too wide.
Update examples (and demos) of these builds to showcase the new features.
I can provide the content by midweek next week at best since I'm pretty overloaded right now. 馃槄 hope that's okay
@gok9ok Sounds good to me. @Reinmar, does it make sense for the roadmap?
I'll be able to update the build screenshots when
Find the space for them in the toolbars.
is approved by the reviewer.
The constellation is here https://github.com/ckeditor/ckeditor5/pull/1254.
I merged everything. The remaining thing is updating the content.
Let's keep this open to not forget about updating the content of editor demos.
Just FYI https://github.com/ckeditor/ckeditor5/issues/1247#issuecomment-423119193 has been addressed in https://github.com/ckeditor/ckeditor5-ui/issues/123
Updated the content of the build examples in b18b18c24ccf0138a2ee8e64487008f65e4341cd.