444 use websocket to trigger reloads (#458)

* [#444] added refresh on sync token calendar update

* [#444] added refresh on register and tests

* [#444] extracted logic for useEffects and updates

* [#444] refactored code structure to use absolute paths

src/utils/findCalendarById.ts

@@ -0,0 +1,17 @@
+import { RootState } from "../app/store";
+import { Calendar } from "../features/Calendars/CalendarTypes";
+
+export function findCalendarById(
+  state: Partial<RootState>,
+  calendarId: string
+): { calendar: Calendar; type?: "temp" } | undefined {
+  if (calendarId.length === 0) {
+    return;
+  }
+  if (state.calendars?.list?.[calendarId]) {
+    return { calendar: state.calendars.list[calendarId] };
+  }
+  if (state.calendars?.templist?.[calendarId]) {
+    return { calendar: state.calendars.templist[calendarId], type: "temp" };
+  }
+}