Closing out json data types

[mike-hogan]

• [x] data system config to work from the schema in the property descriptor, not from a special registry
• [x] json schema driven form editor, that fits into the Slot Configurer UI and the System Configuration UI
• [x] multiple lines config option on String needs to be a checkbox
• [x] Date retains the config options of the underlying string. Should have nothing
• [x] #82

[mike-hogan]

Done