ui: Select static bootprotocol

Previously the bootprotocol was set incorrectly when a NIC had a static
IP. The bootprotocol was set to Disabled instead of Static.
Now Static is selected when a static IP is set.

Change-Id: Ib9a77ef28318c1ce16fb311e62ed6134785e19fc
Signed-off-by: Fabian Deutsch <fabiand@fedoraproject.org>