Enhancement request - update to ace editor

[bsurnida]

Any chance we can update the editor to use the ACE editor https://ace.c9.io/
ACE is a powerful editor and gets most of the features that you get in brackets or atom like code folding and error highlighting.

[bsurnida]

Here is a list of features provided by ACE editor.

Syntax highlighting for over 110 languages (TextMate/Sublime Text.tmlanguage files can be imported)
Over 20 themes (TextMate/Sublime Text .tmtheme files can be imported)
Automatic indent and outdent
An optional command line
Handles huge documents (four million lines seems to be the limit!)
Fully customizable key bindings including vim and Emacs modes
Search and replace with regular expressions
Highlight matching parentheses
Toggle between soft tabs and real tabs
Displays hidden characters
Drag and drop text using the mouse
Line wrapping
Code folding
Multiple cursors and selections
Live syntax checker (currently JavaScript/CoffeeScript/CSS/XQuery)
Cut, copy, and paste functionality