Bug 36911: Reindent circ-menu.inc

Bug 36911: Reindent circ-menu.inc

This patch reindents the circ-menu include file so that it has
consistent indentation. These changes should have no visible effect on
the page.

To test, apply the patch and enable the 'CircSidebar' system
preference if necessary.

- View any circulation page, including the checkout page, to confirm
  that the left-hand sidebar menu is unchanged.
- Test with the 'patronimages' system preference both on and off.

Viewing the diff while ignoring whitespace changes should show only
places where a line break was added.

Signed-off-by: David Nind <david@davidnind.com>
Signed-off-by: Katrin Fischer <katrin.fischer@bsz-bw.de>