Please considering adding a 'Refresh' button to refresh quotes in Watchlist view.
Could simply be the same behavior as found in the Dashboard view, or perhaps restricted to only the securities in the Watchlist.
This already exists: click the ••• icon above the list of securities and select "Update Security Prices" from the short dropdown menu:
@jacobs — I'm almost certain I checked there, but somehow I must've missed that option — thanks for your help!