Add Keyboard Shortcuts to Chrome Extension

[Zweihander-Main]

Request:
It would be great if you could navigate using keyboard shortcuts on the Chrome new tab page. This would allow a generally faster workflow particularly when completing a lot of small tasks or 'neverminding' a lot of tasks at the end of the day.

Potential Problem:
When you open a new tab in Chrome, the DOM isn't usually selected so keyboard shortcuts wouldn't work. However, there's usually a way to select the DOM of the new tab extension -- tab, double tapping tab, double tapping F6, triple tapping F6 (if the bookmarks bar is open), possibly Control-Tab on OSX, ect.

Sample code:
Just looking through the installed extension code, the following on complice_newtabpage.js replacing the keypress event listener would do it:

document.addEventListener('keydown', function(e) {
  //keypress is deprecated and may not be os-agnostic
  if (!e.repeat) {
    switch (e.key) {// keyCode and which are deprecated
      case 'Enter':
        var match = text.match(linkRegex);
        if (match && match[0]) { //stops error when no link present
          window.open(match[0], '_self');
        }
        break;
      case ' ':
        $donebtn.click();
        break;
      case '%':
        $nevermindbtn.click();
        break;
      case 'J':
        document.getElementById('deferNextbtn').click();
        break;
      case 'L':
        document.getElementById('deferLastbtn').click();
        break;
    }
  }
});

Would be happy to put this in a pull request.

Other ideas:

• Adding in '?' functionality from Complice to show these shortcuts
• Adding in a shortcut to open the today page ('g t')
• Adding in shortcuts to open other pages ('g e', 'g g', 'g r', 'g s')