non-contiguous row selection results in less transparent selection bg color

[dsmmcken]

Selecting every other row in a table via (ctrl/cmd) results in the selection bg color getting less and less transparent. I am going to guess we are re-drawing the same selection over and over incorrectly.

Steps to reproduce:

1. make a table, select every other row by holding ctrl/cmd as you click.

Result:

Expected Result (just the bg color, can't make the same selection):

[dsmmcken]

Would be a good e2e screenshot candidate

[dsmmcken]

Duplicate of purged enterprise ticket: https://deephaven.atlassian.net/browse/DH-9637