Automatically focusing the search element on the initial page load and on every auto-refresh of the menu is disruptive
for both mobile devices and screen readers.
fixes#7697
Put the navigation into a container and reload it once every 15 seconds from a distinct menu action. Include the current
path into an URL param to still be able to mark the current menu item as active.
fixes#6955
The menu was being rendered through recursive partials before. The
overhead this fact implicates is not as efficient as standard recursion
so there is now a special renderer for Icinga\Web\Menu utilizing
the RecursiveIteratorIterator
refs #6153
Eric Lippmann
Matthias Jentsch
Marius Hein
Johannes Meyer
Thomas Gelf