HTML-only string editor

[geraintluff]

Currently, there is no way for a renderer to render a text input as HTML, and get any sort of callback when the value changes.

[geraintluff]

Options include:

• methods in the context to produce inputs of various types (eurgh)
• methods in the context to locate an input and attach to it by hand (eurgh)
• magic and rainbows

[geraintluff]

Solution: created context.inputNameForAction() method.

This method returns a name for use as a form input, and then registers "change" event handlers during the enhancement sweep.

Now to actually write the string renderer...