Fix date sorting

src/app/services/sorting.service.ts

@@ -9,7 +9,7 @@ export function sortByStringAscending<T>(items: T[], key: (T) => string) {
 }
 
 export function sortByDateAscending<T>(items: T[], key: (T) => Date) {
-  return items.sort((a, b) =>  <any>key(b) - <any>key(a));
+  return items.sort((a, b) =>  (key(a) as any) - (key(b) as any));
 }
 
 export function getNumberForPriority(priority: Priority): number {