- enabled more strict return function checking and fixed errors

src/components/404internal/Chat404.tsx

...ponents/codeEditors/aceEditors/aceEditorsStorageHelper.ts

src/constants.ts

src/helpers/markdownHelper.ts

src/state/actions/doExerciseSite/doExerciseCrudActions.ts

...ons/editCustomProjectSite/editCustomProjectCrudActions.ts

src/state/actions/tutorViewSite/tutorViewSiteCrudActions.ts

tsconfig.json