don't call setState after the component is unmounted (#3584)
don't call setState after the component is unmounted (#3584)


petrjasek/superdesk-client-core,petrjasek/superdesk-client-core,petrjasek/superdesk-client-core,superdesk/superdesk-client-core,petrjasek/superdesk-client-core,superdesk/superdesk-client-core,superdesk/superdesk-client-core,petrjasek/superdesk-client-core,superdesk/superdesk-client-core,superdesk/superdesk-client-core