roleme: fix role lookup in no subcommand

src/modules/roleme.js

@@ -207,7 +207,7 @@ roleme.callback = async function (msg, line, args) {
         return "I do not have `Manage Roles` permission.";
       }
 
-      const role = await lookupRole(msg, argStr);
+      const role = await lookupRole(msg, (subcommand + " " + argStr).trim());
       if (role === "No results") return role;
 
       const roles = await getRoles(msg.guildID);