LP1843837 Vandelay queue import selection persistence

LP1843837 Vandelay queue import selection persistence

Manage grid row selection locally for the Vandelay Inspect Queue
interface (similar to the Record Matches interface) so the set of
selected records and optional merge/overlay targets may persist across
grid renderings without having to synchronize selection between the grid
and the Vandelay service.

To test, create a queue with matches, select some items in the grid,
click on one of the matches to select a match, then return to the grid.
Both the newly selected match-target row and the previously selected
rows will retain their selection.

Signed-off-by: Bill Erickson <berickxx@gmail.com>