Fauxton: fix sorting for tasks on click

there is no node property, but a target, source or database
depending on the task
Fauxton: Cleanup whitespace
Fauxton: fix burger

- Fix z-index issue for Firefox, the burger doesn't need an own
  width and high z-index

- Fix accidental horizontal scrollbar in resize-handler

COUCHDB-2234
Fauxton: fix scrollbar in burger-navbar

Remove the scrollbar that was visible above the dashboard window
when you scrolled up & down with a small, collapsed navbar

COUCHDB-2234
Fauxton: Sidebar do not show texts in collapsed view
Fauxton: remove not used transitions

They will trigger now, as we change the width
Fauxton: fix width for the animation of the logo