userportal,webadmin: Fix layout issues in vNIC dialog

There were all sorts of layout issues in the dialog in different
locales. This fixes all of them; more space is allocated to the radio
button labels which fixes breakage, and it's put at the end of the
dialog (so all aligned text boxes will appear first).

Change-Id: I31877f7f2370bd92161d2792533e410f16bf0254
Bug-Url: https://bugzilla.redhat.com/1032519
Bug-Url: https://bugzilla.redhat.com/1079877
Bug-Url: https://bugzilla.redhat.com/1115018
Bug-Url: https://bugzilla.redhat.com/1120976
Bug-Url: https://bugzilla.redhat.com/1123747
Signed-off-by: Lior Vernia <lvernia@redhat.com>