Close default tab to reset to blank

It's very annoying when I have a loaded script in the default tab, but finish with it and can't close it. Can you add functionality (via right-click > close query tab) that closes the loaded script and returns the default tab to blank?

You can doubleclick the last tab to make it empty.

Ooooh, really? Maybe you could put that in a tool tip over the last tab? :)