fix: use `env_subfolder` if is set, check against 'false' string.
fix: use `env_subfolder` if is set, check against 'false' string.

hlmnrmr/superdesk-core,petrjasek/superdesk-core,mugurrus/superdesk-core,ioanpocol/superdesk-core,mugurrus/superdesk-core,marwoodandrew/superdesk-core,superdesk/superdesk-core,nistormihai/superdesk-core,mugurrus/superdesk-core,superdesk/superdesk-core,petrjasek/superdesk-core,superdesk/superdesk-core,mdhaman/superdesk-core,ancafarcas/superdesk-core,mdhaman/superdesk-core,ioanpocol/superdesk-core,petrjasek/superdesk-core,ioanpocol/superdesk-core,ancafarcas/superdesk-core,hlmnrmr/superdesk-core,superdesk/superdesk-core,mdhaman/superdesk-core,petrjasek/superdesk-core,marwoodandrew/superdesk-core,nistormihai/superdesk-core