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

frontend/src/components/UserList/UserList.tsx

@@ -24,7 +24,7 @@ const createTableEntries = (entries: TableEntry[]) =>
 const UserList: React.FC<IUserListProperties> = (props: IUserListProperties) => (
     <div className="UserList" data-testid="UserList">
         <SeasonSwitch {...props} />
-        <table>
+        <table className={!props.enabled ? "blurred" : ""}>
             <thead>
             <tr>
                 <th>Placement</th>
@@ -43,7 +43,7 @@ const UserList: React.FC<IUserListProperties> = (props: IUserListProperties) =>
 export interface IUserListProperties {
     userStats: UserStatsResponse
     mocked?: boolean
-    onSeasonIdChange: any
+    onSeasonIdChange: React.Dispatch<React.SetStateAction<string | undefined>>
     enabled: boolean
 }