Bug 21350: Added icon to Pending on-site checkouts and moved

Bug 21350: Added icon to Pending on-site checkouts and moved

When pending on-site checkouts is enabled, it will display checkout items that are being used in the library

test plan:
1. Go to Koha administration
2. Search for "onSiteChekouts"
3. Enable "onSitecheckout"
4. Save all Circulation preferences
5. Go back to home page and click "Circulations"
6. Please confirm there is an icon and the link is below Fast cataloging

Signed-off-by: Séverine QUEUNE <severine.queune@bulac.fr>
Signed-off-by: Jonathan Druart <jonathan.druart@bugs.koha-community.org>
Amended patch: replace tabs with 4 spaces

Signed-off-by: Nick Clemens <nick@bywatersolutions.com>