#204 Error management (#237)

* added error snackbar for api fails
* improved error page to be shown only for userdata errors and to allow retrying
* fixed test breaking only in local because of timezone and reduced warnings for easier reading of tests results
* added error management for failure inside calendars imports
* added error snackbar for api fails
* improved error page to be shown only for userdata errors and to allow retrying
* added error management for failure inside calendars imports

Co-authored-by: Camille Moussu <cmoussu@linagora.com>

__test__/features/user/HandleLogin.test.tsx

@@ -73,9 +73,9 @@ describe("HandleLogin", () => {
 
     expect(screen.getByAltText("loading")).toBeInTheDocument();
   });
-  test("goes to error page when userData doesnt exists after loading and calendars pending is false", () => {
+  test("goes to error page when there is error in user data", () => {
     const dispatch = appHooks.useAppDispatch();
-    renderWithProviders(<HandleLogin />, { user: { loading: false } });
+    renderWithProviders(<HandleLogin />, { user: { error: true } });
     expect(dispatch).toHaveBeenCalledWith(push("/error"));
   });
 });