A11y: Use pointer cursor on webkit field cancellation buttons.

Webkit-based browsers add a cancel button to search inputs. This input uses the default cursor standard to buttons and inputs, but the WordPress admin applies the `pointer` cursor to buttons and inputs. Apply the WordPress standard pointer to this pseudoelement for UI consistency.

Props sumitsingh, manhphucofficial, joedolson, sabernhardt, dhruvang21.
Fixes #64382.

git-svn-id: https://develop.svn.wordpress.org/trunk@61514 602fd350-edb4-49c9-b593-d223f7449a82

Author: joedolson

src/wp-admin/css/forms.css

@@ -209,6 +209,10 @@ input[type="search"]::-webkit-search-decoration {
 	display: none;
 }
 
+input[type="search"]::-webkit-search-cancel-button {
+	cursor: pointer;
+}
+
 .wp-admin input[type="file"] {
 	padding: 3px 0;
 	cursor: pointer;