(to-revert)appview: markup: work around the fact that [onload] is cringe

appview/pages/markup/markdown.go

···
 							setTimeout(() => { this.innerText = 'Copy' }, 1500);
 						`,
 					},
-					{
-						Key: "onload",
-						Val: "this.removeAttribute('aria-hidden')",
-					},
-					{
-						Key: "aria-hidden",
-						Val: "true",
-					},
+					// FIXME: onload does not fire :/
+					// {
+					// 	Key: "onload",
+					// 	Val: "this.removeAttribute('aria-hidden')",
+					// },
+					// {
+					// 	Key: "aria-hidden",
+					// 	Val: "true",
+					// },
 					{
 						Key: "title",
 						Val: "Copy to clipboard",