Changes to Email Disable

removed the enum value item from the query request parameter obj_type

the query request parameter obj_type was restricted to a list of enum values

added the new enum value item to the query request parameter obj_type

added the new enum value project to the query request parameter obj_type

added the new enum value project_comments to the query request parameter obj_type

added the new enum value task to the query request parameter obj_type

for the query request parameter obj_type, the type was generalized from no type to string