lib: add onChange callback with error to FileAutoComplete component
lib: add onChange callback with error to FileAutoComplete component

Closes #8012
Reviewed-by: Peter <a316049dd34607c62d4611d63ab22a6454add223@redhat.com>

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