fixed formatting for multiple image removal
fixed formatting for multiple image removal

addressing issue #1414: altered json string format after removing image from multiple image type field
fletch3555/voyager,davodavodavo3/voyager,davodavodavo3/voyager,akaZorg/voyager,Elyahou/voyager,handiwijoyo/voyager,darit/voyager,handiwijoyo/voyager,SaadEddinHassania/voyager,fergthh/voyager,fergthh/voyager,the-control-group/voyager,Elyahou/voyager,SaadEddinHassania/voyager,akaZorg/voyager,fletch3555/voyager,voodoostudio/One_admin,darit/voyager,the-control-group/voyager,voodoostudio/One_admin