fix: onMount type issue

Author: georgylobko

src/app-layout/drawer/interfaces.ts

@@ -14,7 +14,7 @@ export interface DesktopDrawerProps {
   toggleRefs: {
     toggle: React.Ref<{ focus(): void }>;
     close: React.Ref<{ focus(): void }>;
-    onMount: () => void;
+    onMount?: () => void;
   };
   width: number;
   topOffset: number | undefined;

src/app-layout/utils/use-focus-control.ts

@@ -12,7 +12,7 @@ export interface FocusControlRefs {
   toggle: RefObject<Focusable>;
   close: RefObject<Focusable>;
   slider: RefObject<HTMLDivElement>;
-  onMount?: (node: HTMLDivElement) => void;
+  onMount?: () => void;
   focusPromise?: any;
 }