PLT-3221 Remove async call to get posts when creating a comment and editing a post (#3300)

PLT-3203 Commenting on the RHS while in permalink view makes the message not show up in the RHS

webapp/utils/constants.jsx

@@ -41,6 +41,7 @@ export default {
         CREATE_CHANNEL: null,
         LEAVE_CHANNEL: null,
         CREATE_POST: null,
+        CREATE_COMMENT: null,
         POST_DELETED: null,
         REMOVE_POST: null,