Fix react warnings and part of backstage (#4706)

webapp/utils/constants.jsx

@@ -90,7 +90,7 @@ export const ActionTypes = keyMirror({
     RECEIVED_PROFILES_IN_TEAM: null,
     RECEIVED_PROFILE: null,
     RECEIVED_PROFILES_IN_CHANNEL: null,
-    RECEIVED_PROFILE_NOT_IN_CHANNEL: null,
+    RECEIVED_PROFILES_NOT_IN_CHANNEL: null,
     RECEIVED_ME: null,
     RECEIVED_SESSIONS: null,
     RECEIVED_AUDITS: null,