Prepare for React 19 upgrade (#29612)

Signed-off-by: Michael Telatynski <7t3chguy@gmail.com>

src/components/structures/AutoHideScrollbar.tsx

@@ -8,7 +8,7 @@ Please see LICENSE files in the repository root for full details.
 */
 
 import classNames from "classnames";
-import React, { type HTMLAttributes, type JSX, type ReactHTML, type ReactNode, type WheelEvent } from "react";
+import React, { type HTMLAttributes, type JSX, type ReactNode, type WheelEvent } from "react";
 
 type DynamicHtmlElementProps<T extends keyof JSX.IntrinsicElements> =
     JSX.IntrinsicElements[T] extends HTMLAttributes<object> ? DynamicElementProps<T> : DynamicElementProps<"div">;
@@ -27,7 +27,7 @@ export type IProps<T extends keyof JSX.IntrinsicElements> = Omit<DynamicHtmlElem
 
 export default class AutoHideScrollbar<T extends keyof JSX.IntrinsicElements> extends React.Component<IProps<T>> {
     public static defaultProps = {
-        element: "div" as keyof ReactHTML,
+        element: "div" as keyof HTMLElementTagNameMap,
     };
 
     public readonly containerRef = React.createRef<HTMLDivElement>();

src/components/structures/ContextMenu.tsx

@@ -440,7 +440,7 @@ export default class ContextMenu extends React.PureComponent<React.PropsWithChil
         );
     }
 
-    public render(): React.ReactChild {
+    public render(): JSX.Element {
         if (this.props.mountAsChild) {
             // Render as a child of the current parent
             return this.renderMenu();