GCS config:Renamed airframe.ui scrollArea to avoid popup on form opening

QtCreator bothers you with a popup if you have more than one widget on
your form with the same name. This happens when you manually edit ui
files.
GCS config:Find multitype by combobox QVariant user Data and not by string
Merge pull request #1092 from lilvinz/backport_gcs_octox_fix

Backport to master of the "GCS Octox fix"