Bug 26809: Removes full stops from admin-home.tt

Bug 26809: Removes full stops from admin-home.tt

To be consistent with the formatting of the Tools module this patch removes
full stops from administration descriptions.

To test:
1) Go to Administration module and note inconsistent use of full stops
2) Apply the patch
3) Go to Administration module and note absence of full stops on
descriptions

Sponsored-by: Catalyst IT
Signed-off-by: Lisette Scheer <lisettes@latahlibrary.org>
Signed-off-by: Nick Clemens <nick@bywatersolutions.com>
Signed-off-by: Jonathan Druart <jonathan.druart@bugs.koha-community.org>