Fix useRef TypeScript errors

src/components/pages/NewUserPage.tsx

@@ -24,7 +24,7 @@ type ItemsArr = {
 const NewUserPage: FunctionComponent = () => {
     const [ channelsItems, setChannelsItems ] = useState([]);
     const [ mediaFoldersItems, setMediaFoldersItems ] = useState([]);
-    const element = useRef(null);
+    const element = useRef<HTMLDivElement>(null);
 
     const getItemsResult = (items: ItemsArr[]) => {
         return items.map(item =>

src/components/pages/UserEditPage.tsx

@@ -31,7 +31,7 @@ const UserEditPage: FunctionComponent = () => {
     const [ authenticationProviderId, setAuthenticationProviderId ] = useState('');
     const [ passwordResetProviderId, setPasswordResetProviderId ] = useState('');
 
-    const element = useRef(null);
+    const element = useRef<HTMLDivElement>(null);
 
     const triggerChange = (select: HTMLInputElement) => {
         const evt = document.createEvent('HTMLEvents');

src/components/pages/UserLibraryAccessPage.tsx

@@ -25,7 +25,7 @@ const UserLibraryAccessPage: FunctionComponent = () => {
     const [mediaFoldersItems, setMediaFoldersItems] = useState([]);
     const [devicesItems, setDevicesItems] = useState([]);
 
-    const element = useRef(null);
+    const element = useRef<HTMLDivElement>(null);
 
     const triggerChange = (select: HTMLInputElement) => {
         const evt = document.createEvent('HTMLEvents');

src/components/pages/UserParentalControl.tsx

@@ -32,7 +32,7 @@ const UserParentalControl: FunctionComponent = () => {
     const [ accessSchedules, setAccessSchedules ] = useState([]);
     const [ blockedTags, setBlockedTags ] = useState([]);
 
-    const element = useRef(null);
+    const element = useRef<HTMLDivElement>(null);
 
     const populateRatings = useCallback((allParentalRatings) => {
         let rating;

src/components/pages/UserProfilesPage.tsx

@@ -23,7 +23,7 @@ type MenuEntry = {
 const UserProfilesPage: FunctionComponent = () => {
     const [ users, setUsers ] = useState([]);
 
-    const element = useRef(null);
+    const element = useRef<HTMLDivElement>(null);
 
     const loadData = () => {
         loading.show();