When value is null or zero length, Navi displays nothing

[CzBiX]

will not display anything when value is None

[swdunlop]

With the addition of set-value for navi, this prevents fields from being edited. The solution may be to JSON-encode all values so there will at least be a "" or a null to click on and edit.

[CzBiX]

maybe you can put {'modifiability': false} in respond.
I don't know coffeescript, neither interested in it, so... :-)

[swdunlop]

Starting a branch to move Navi to Ember.JS or something similar -- now that we can change values, there's all sorts of book keeping like "make sure all copies of this value are updated" that are better handled with a real framework.

I totally understand about not wanting to learn CoffeeScript. It's only advantage for me is not being JavaScript. :)