Fix bug in test_read_only_connections_cannot_be_deleted_in_WiringEditor

Signed-off-by: Álvaro Arranz <aarranz@conwet.com>
Rename 'widget' to 'position' in wiringStatus

Signed-off-by: Álvaro Arranz <aarranz@conwet.com>
Rename widget to position in wiring tests