title: Vim change titlebar to match file in tab
body: <p>If I open a file in vim, the titlebar displays the file and path of what I opened. Great. But if I open another tab, and switch to that new tab, the title bar never changes. Even if I completely change files, such as by doing <code>:edit &lt;newfile&gt;</code>, the title bar never changes. </p>
  
  <p>I have set the status bar to correctly match the file that is open, however I would like the title bar to do the same. Its confusing sometimes seeing different information displayed at the top and bottom of my window. How can I set the title bar to display the new file that is currently displayed?</p>