userportal,webadmin: Alignment issues in run once dialog

2 issues:
- cloud init / network: in FR locale did not fit in. Fixed by making the dialog
  big enough that everything fits in
- display / SPICE copy paste and SPICE file trenasfer label did not fit in.
  Fixed by making the checkboxes' labels bigger (same approach as on new /
  edit VM dialog)

Change-Id: I37cf4c8909301ac3da6d414d0021af68d221f994
Bug-Url: https://bugzilla.redhat.com/1123749
Bug-Url: https://bugzilla.redhat.com/1123237
Signed-off-by: Tomas Jelinek <tjelinek@redhat.com>