Change id generation algorithm, display notifications total on the main page

client/src/selectors/common.js

@@ -1,5 +1,3 @@
-export const maxIdSelector = ({ db }, modelName) => db[modelName].meta.maxId;
-
 export const accessTokenSelector = ({ auth: { accessToken } }) => accessToken;
 
 export const isAppInitializingSelector = ({ app: { isInitializing } }) => isInitializing;