Bug 16803: Add Font Awesome Icons to "Select/Clear all" links to shelves.tt

Bug 16803: Add Font Awesome Icons to "Select/Clear all" links to shelves.tt

Add Font Awesome Icons to "Select/Clear all" links to shelves.tt
(Public and private lists)

To test:
-Apply patch
-Go to More -> Lists
-Create some Public and Private Lists
-See the contents of the list and notice about the new icons in
 "Select/Clear  all"

Signed-off-by: Marc Véron <veron@veron.ch>
Signed-off-by: Jonathan Druart <jonathan.druart@bugs.koha-community.org>
Signed-off-by: Kyle M Hall <kyle@bywatersolutions.com>