This updates the column to help identify when a review request has been

updated since receiving one or more Ship It! reviews. Now, if a review

request has been updated, the Ship It! count still remains, but the

color is grey instead of green, making it stand out and helping

reviewers know that they should look at the change again.
This also makes this column accessible. The indicator has an ARIA label

and title that convey the contents, with the icon and count being hidden

from the accessibility tree.
The text is localized based on the number of items, so there's a

different string for 1 Ship It or issue vs. many.

Tested with every combination of Ship It/Issue state and stale state,

verifying the tooltip and presentation.
Unit tests pass.