[Adaptive] Include UI schema for adaptive dialog and its components

[vishwacsena]

Consider enhancing the UI schema to enable ‘instructions’ on how to render, group, collapse, etc. provide tooling for creating and managing UI schema. UI functionality includes show/hide; ordering’ grouping; collapsible groups + group name; property must set value;

This should include review of schema for all current steps and suggest field treatment for UI

[Stevenic]

We should follow the x-ms-foo pattern of naming as used in PowerApps Custom Connectors.

[vishwacsena]

@cwhitten - do we have a spec for this? This item is tracking work to update/ include the UI schema with all our components.

[vishwacsena]

Moved this off 4.6 - no longer a core requirement for 4.6 preview.