Refactor zoomer macro to take into account CSS classes

core/modules/macros/zoomer.js

@@ -100,15 +100,19 @@ exports.handleEvent = function(event) {
 
 exports.executeMacro = function() {
 	this.inZoomer = false;
-	return $tw.Tree.Element("div",{
+	var attributes = {
 		style: {
 			"position": "absolute",
 			"right": "0",
 			"top": "0",
 			"min-width": "16px",
-			"height": "100%"
+			"height": "100%" // Makes the height the same as the body, since the body is position:relative
 		}
-	},[]);
+	};
+	if(this.classes) {
+		attributes["class"] = this.classes.slice(0);
+	}
+	return $tw.Tree.Element("div",attributes,[]);
 };
 
 })();