There should always be one tab on the tab bar

On the desktop version of AngelFish, (if we have the "Always Show the Tab Bar" option ON) when we close the last tab, we end up with an empty space on the tab bar and a "_blank" page. We can still type URL's and make queries but it no longer shows up as a tab.

As such, i would suggest as a resolution for this bug to either close the browser when the last tab is closed or always keep a tab open on the tab bar even when we close the last one (keep a tab visible and set to blank)