improved storage api

mods/_wbg/modcompat/scripts/storageinterface.moon

@@ -75,7 +75,11 @@ reg.digiline = {
         if type(msg) == 'table'
           first = true
           for str in *msg
-            filter ..= (first and '' or ',')..'"'..str..'"'
+            if string.sub(str, 1, 6) ~= "group:"
+              str = '"'..str..'"'
+            if not first
+              str = ','..str
+            filter ..= str
             first = false
         elseif type(msg) == 'string'
           filter = msg