message: Move to composer when typing letters with Shift held
  We already jump to the composer for unshifted typing, but we should also do so
  with Shift as well.
  Fixes
diff: @@ -337,13 +337,13 @@ const LoggedInView = createReactClass({
  let handled = false;
  const ctrlCmdOnly = isOnlyCtrlOrCmdKeyEvent(ev);
  - const hasModifier = ev.altKey || ev.ctrlKey || ev.metaKey || ev.shiftKey ||
  - ev.key === Key.ALT || ev.key === Key.CONTROL || ev.key === Key.META || ev.key === Key.SHIFT;
  + const hasModifier = ev.altKey || ev.ctrlKey || ev.metaKey || ev.shiftKey;
  + const isModifier = ev.key === Key.ALT || ev.key === Key.CONTROL || ev.key === Key.META || ev.key === Key.SHIFT;
  switch (ev.key) {
  case Key.PAGE_UP:
  case Key.PAGE_DOWN:
  - if (!hasModifier) {
  + if (!hasModifier && !isModifier) {
  this._onScrollKeyPressed(ev);
  handled = true;
  }
  @@ -384,7 +384,10 @@ const LoggedInView = createReactClass({
  if (handled) {
  ev.stopPropagation();
  ev.preventDefault();
  - } else if (!hasModifier) {
  + } else if (!isModifier && !ev.altKey && !ev.ctrlKey && !ev.metaKey) {
  + // The above condition is crafted to _allow_ characters with Shift
  + // already pressed (but not the Shift key down itself).
  +
  const isClickShortcut = ev.target !== document.body &&
  (ev.key === Key.SPACE || ev.key === Key.ENTER);
  