The icon does not match the others because the NuvolaX icon theme seems
to have vanished from the Internet. Ideally all those admin icons could
use a replacement. But that should be a different PR I guess.

adds aria handling to makeToggle and allows to supress it in dw_toggle

removed </a>

This reverts commit 3940c519 as
discussed in #1082.

Added file-in-use reference to page

Since the pageid is no longer positioned absolute it clashed with the
sidebar since #1027. this introduces a very simplisitc fix.

This reverts commit 362a4f08.

This moves the message area into content div. The pageid is now aligned
by floating instead of absolute positioning.

As described in the common idioms of the HTML5 spec, mark up navigation as a list inside a `nav` element for better semantics and accessibility.

see:

  * http://www.w3.org/html/wg/drafts/html/master/common-idioms.html#rel-up
  * http://lists.w3.org/Archives/Public/public-html/2013Nov/thread.html#msg6
  * https://dl.dropboxusercontent.com/u/377471/breadcrumb.html

for discussion and background.

- refactor detail en mediamanager link creation
- refactor metadata listing

fixed pagetools being inaccessible on screens lacking necessary height, and aligned them to content when on smaller screens