webadmin: Add ability to set the "force" label

Added ability to set the "Force remove" check box label to be able to
use it to specify a more detailed message.
The force default value will be taken from the field force in the model.

Change-Id: If200c35cf36cf6f0fd7aa3d8ad0b0b59ce3ac1f8
Signed-off-by: Mike Kolesnik <mkolesni@redhat.com>