Bug 27631: admin folder

Bug 27631: admin folder

Changed each of the pages in the admin folder to have one <h1> tag
showing that describes the page, rather than the <h1> describing the
logo.

The hierarchy of heading tags may be broken in many pages, but this
will be dealt with in an additional bug.

To test:
1) Go to the Staff Client
2) Apply patch
3) Go to each of the pages in the admin folder and check that they have
   an obvious and descriptive heading
4) Ensure that the heading in the page is <h1>

Sponsored-by: Catalyst IT
Signed-off-by: Owen Leonard <oleonard@myacpl.org>
Signed-off-by: Katrin Fischer <katrin.fischer.83@web.de>
Signed-off-by: Fridolin Somers <fridolin.somers@biblibre.com>