Update React, fix null dates, add default route for missing season ID and move blurred area effect to table only

frontend/src/components/SeasonDetail/SeasonDetail.tsx

@@ -7,17 +7,21 @@ const SeasonDetail: React.FC<IUserListProperties> = (props: IUserListProperties)
 
   return (
     <span className="SeasonDetail" data-testid="SeasonDetail">
-      Season {seasonId} - Duration: {dates.start.toDateString()} - {dates.end.toDateString()}
+      Season {seasonId} - Duration: {dateToString(dates.start)} - {dateToString(dates.end)}
     </span>
   )
 }
 
+const dateToString = (date?: Date): string => {
+  return date ? date.toLocaleDateString('en-GB') : 'TBD';
+}
+
 export interface SeasonDetailProperties {
-  seasonId: string,
+  seasonId?: string,
   maxSeasonId: string
   dates: {
-    start: Date,
-    end: Date
+    start?: Date,
+    end?: Date
   }
 }