Follow same method to add printers, multiples or not.  Allow capability to apply a default printer from the Group page.  There's no return on which one is defaulted after it is applied other than going to the host(s) to verify.

git-svn-id: https://svn.code.sf.net/p/freeghost/code/trunk@2258 71f96598-fa45-0410-b640-bcd6f8691b32
Merge svn with master