Only wrap iframes that don't specify their own height

Shared/Article Rendering/ArticleRenderer.swift

@@ -333,6 +333,9 @@ private extension ArticleRenderer {
 		var init = {
 			wrapFrames: function () {
 				document.querySelectorAll("iframe").forEach(element => {
+					if (element.height > 0 || parseInt(element.style.height) > 0)
+						return;
+		
 					var wrapper = document.createElement("div");
 					wrapper.classList.add("iframeWrap");
 					element.parentNode.insertBefore(wrapper, element);