Sharing Block > Native sharing: use relevant link for popup (#41002)

* Use relevant link for sharing popup

See: #39060.

This switches the tooltip to use the associated link, rather than any element containing the `tooltiptext` class within the page.

projects/plugins/jetpack/changelog/fix-sharing-dialog-location

@@ -0,0 +1,4 @@
+Significance: patch
+Type: bugfix
+
+Sharing: Fix the location of the sharing dialog, so it is not always the first sharing element on the page

projects/plugins/jetpack/extensions/blocks/sharing-buttons/view.js

@@ -39,7 +39,7 @@ if ( typeof window !== 'undefined' ) {
 					if ( link?.href && isWebShareAPIEnabled( { url: link.href } ) ) {
 						navigator.share( { url: link.href } );
 					} else {
-						const [ tooltip ] = document.getElementsByClassName( 'tooltiptext' );
+						const [ tooltip ] = link.getElementsByClassName( 'tooltiptext' );
 						if ( tooltip && tooltip.style ) {
 							tooltip.style.display = 'initial';
 							setTimeout( () => {