Bastion: Adding data structures for table entities to support show/hide and collapse.
Merge pull request #2477 from ehelms/bastion

Bastion: Adding sticky headers and table body scrolling.
Merge pull request #2538 from ehelms/bastion

Bastion: Adding data structures for table entities to support show/hide ...
Bastion: wiring up ui state machine for nutupane.

Using a state machine to keep track of whether the "action pane" is opened, etc.