Draft: Improve DefaultObject for use as ewoks processor

Required for dynamic properties for daiquiri!830

Adds:

• server-side validation
• promise feedback
• pending ux for un-submitted changes and on blur reset (yellow background)
• secondary popup to declutter main object
• support nested objects
• editable keys for nested objects

Also adds:

• BoolButton that can be used with ui:widget: 'BoolButton' in schemas