title: What command focuses an open file in another window?
body: <p>If I'm in window A, and file <code>foo.txt</code> is open in window B, I want a command that works like <code>workbench.action.quickOpen</code>, but instead of opening another copy of <code>foo.txt</code> in window A, I want it to focus the <code>foo.txt</code> tab within window B. If there's no built-in command, is there an extension that provides this function?</p>