Fossil

**
** Ideas and TODOs:
**
**  o Shortcut to select the topmost or bottommost entry, either by separate
**    key, or with modifiers (SHIFT+N, SHIFT+M)?
**  o Shortcut to toggle the tick-mark for the focused check-in node.
**  o Shortcuts to copy branch name or hash of the focused entry to clipboard.
**  o Shortcut to put the focus indicator to the default item(s), in (cyclic)
**    order ticked → highlighted → check-out → ticked → ...
**  o Improve scrolling the focused element into view for browsers without the
**    Element.scrollIntoViewIfNeeded() function, maybe with a Polyfill, or
**    something similar to the scrollToSelected() function in this source file.
*/
(function(){
  window.addEventListener('load',function(){
    function focusDefaultId(){