machines: Add notification area test to createVmDialog
machines: Add notification area test to createVmDialog

Closes #8663

mareklibra/cockpit,andreasn/cockpit,mareklibra/cockpit,stefwalter/cockpit,deryni/cockpit,cockpit-project/cockpit,SotolitoLabs/cockpit,cockpit-project/cockpit,andreasn/cockpit,andreasn/cockpit,cockpituous/cockpit,mareklibra/cockpit,mareklibra/cockpit,SotolitoLabs/cockpit,martinpitt/cockpit,garrett/cockpit,cockpituous/cockpit,moraleslazaro/cockpit,martinpitt/cockpit,cockpituous/cockpit,mvollmer/cockpit,stefwalter/cockpit,deryni/cockpit,cockpit-project/cockpit,martinpitt/cockpit,cockpit-project/cockpit,mareklibra/cockpit,SotolitoLabs/cockpit,stefwalter/cockpit,deryni/cockpit,mvollmer/cockpit,stefwalter/cockpit,SotolitoLabs/cockpit,deryni/cockpit,stefwalter/cockpit,mvollmer/cockpit,SotolitoLabs/cockpit,mareklibra/cockpit,cockpituous/cockpit,martinpitt/cockpit,garrett/cockpit,moraleslazaro/cockpit,cockpituous/cockpit,andreasn/cockpit,moraleslazaro/cockpit,SotolitoLabs/cockpit,garrett/cockpit,garrett/cockpit,stefwalter/cockpit,SotolitoLabs/cockpit,andreasn/cockpit,andreasn/cockpit,mareklibra/cockpit,cockpit-project/cockpit,moraleslazaro/cockpit,garrett/cockpit,cockpituous/cockpit,mvollmer/cockpit,deryni/cockpit,moraleslazaro/cockpit,martinpitt/cockpit,moraleslazaro/cockpit,stefwalter/cockpit,moraleslazaro/cockpit,deryni/cockpit,mvollmer/cockpit,deryni/cockpit,andreasn/cockpit