**
** [0]: The lifetime and values of cookies can be tracked on the /cookies page.
** A session cookie is preferred over other storage APIs because Fossil already
** requires cookies to be enabled for reasonable functionality, and it's more
** likely that other storage APIs are blocked by users for privacy reasons, for
** example.
** [1]: This feature only works with a normal (text) input field hidden by CSS
** styles, instead of a true hidden (by type) input field, so may cause side
** effects, for example with screen readers. Moreover, this feature currently
** only works with Chrome, but not with FF or IE.
** styles, instead of a true hidden (by type) input field, but according to MDN,
** screen readers should ignore it even without an aria-hidden="true" attribute
** (which is even discouraged for hidden by CSS elements). Also, this feature
** breaks if disabled[=true] or tabindex="-1" attributes are added to the input
** field, or (in FF) if page unload handlers are present.
**
** 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 Improve scrolling the focused element into view for browsers without the