* Add SavedTableConfig
* Update table configuration logic to support TableConfigs
* Update table config link when updating table
* Correct docstring
* Misc cleanup
* Use multi-select widgets for column selection
* Return null config params for tables with no model
* Fix auto-selection of selected columns
* Update migration
* Clean up template
* Enforce enabled/shared flags
* Search/filter by table name
* Misc cleanup
* Fix population of selected columns
* Ordering field should not be required
* Enable cloning for TableConfig
* Misc cleanup
* Add model documentation for TableConfig
* Drop slug field from TableConfig
* Improve TableConfig validation
* Remove add button from TableConfig list view
* Fix ordering validation to account for leading hyphens
