UK: when deleting a media file ensure filename is not an empty string
UK: when deleting a media file ensure filename is not an empty string

spatialdev/onadata,mainakibui/kobocat,GeoODK/onadata,mainakibui/kobocat,kobotoolbox/kobocat,jomolinare/kobocat,mainakibui/kobocat,smn/onadata,kobotoolbox/kobocat,qlands/onadata,smn/onadata,sounay/flaminggo-test,piqoni/onadata,mainakibui/kobocat,hnjamba/onaclone,GeoODK/onadata,spatialdev/onadata,spatialdev/onadata,kobotoolbox/kobocat,qlands/onadata,qlands/onadata,jomolinare/kobocat,piqoni/onadata,GeoODK/onadata,kobotoolbox/kobocat,awemulya/fieldsight-kobocat,awemulya/fieldsight-kobocat,awemulya/fieldsight-kobocat,hnjamba/onaclone,sounay/flaminggo-test,sounay/flaminggo-test,awemulya/fieldsight-kobocat,qlands/onadata,hnjamba/onaclone,smn/onadata,smn/onadata,spatialdev/onadata,jomolinare/kobocat,piqoni/onadata,jomolinare/kobocat,hnjamba/onaclone,GeoODK/onadata,sounay/flaminggo-test,piqoni/onadata