Edit Network dialog is cropped in 'es' locale

The vlan tagging checkbox width was 190px, the 'es' text is bigger than
that. Changed to 230px.

Change-Id: I93fbbca346eb60fbc9b7f7637b9634ba45512b78
Bug-Url: https://bugzilla.redhat.com/922726
Signed-off-by: Alona Kaplan <alkaplan@redhat.com>