Replace Ace editor with CodeMirror?

[alexwarren]

As reported on the forums, the Squiffy editor doesn't work with screen readers.

This is entirely a known issue with the Ace editor we're currently using.

Investigate switching to CodeMirror or providing it as an option.

[alexwarren]

CodeMirror is no good either - still has accessibility problems.

Best bet is to have an option to replace Ace editor with a standard textarea.

[alexwarren]

textarea feature opened as separate issue #7