undo should sometimes select a range

[matthewmueller]

Undo is a little bit funky and not like other editors

steps:

1. select a word
2. hit bold
3. unselect (click at end of word)
4. undo

editors like google docs select the range you bolded, while editable will just place the cursor at the end.

[bmcmahen]

Yeah, I remember messing around with this at some point and re-implementing the undo/redo system so that it reselects previous selections. I can see if I can put together a decent PR at some point.

[yields]

yea, there are two choices with contenteditable either let the browser manage undo history or manage it yourself.

i decided to manage it myself, the reason being that i wanted a way to manipulate it like grab history from the server etc..

undo works but yea it's kinda funky, google-docs works well because they created their own layout engine.

(btw let me know if you want to go crazy and create a layout engine, i will join you ;)