Administration: Prevent race condition in wp-tooltip.js delay timer.

Move the timer variable `openTimeout` from the outer scope of the wrapper function to the inner scope, preventing reuse of the same timer instance by different tooltips.

Props fahimmurshed, westonruter, joedolson.
Fixes #65674.

git-svn-id: https://develop.svn.wordpress.org/trunk@63549 602fd350-edb4-49c9-b593-d223f7449a82

Author: joedolson

src/js/_enqueues/wp/wp-tooltip.js

@@ -16,9 +16,6 @@
 
 	const popovers = /** @type {NodeListOf<HTMLSpanElement>} */ ( document.querySelectorAll( '.wp-is-tooltip' ) );
 
-	/** @type {ReturnType<typeof setTimeout>} */
-	let openTimeout;
-
 	popovers.forEach( function( popover ) {
 		const trigger = /** @type {HTMLButtonElement|HTMLAnchorElement|null} */ ( popover.querySelector( '.wp-tooltip__toggle' ) );
 		const panel   = /** @type {HTMLSpanElement|null} */ ( popover.querySelector( 'span.wp-tooltip__bubble' ) );
@@ -31,6 +28,9 @@
 			return;
 		}
 
+		/** @type {ReturnType<typeof setTimeout>} */
+		let openTimeout;
+
 		// Show Tooltip Function (with delay to prevent flickering).
 		const showTooltip = () => {
 			clearTimeout( openTimeout );