fix scrollbar regression

node_modules/ace/lib/ace/mouse/mouse_handler.js

@@ -62,8 +62,8 @@ var MouseHandler = function(editor) {
     event.addListener(mouseTarget, "mousemove", this.onMouseMove.bind(this, "mousemove"));
     event.addMultiMouseDownListener([
         mouseTarget,
-        editor.renderer.scrollBarV && editor.renderer.scrollBarV.element,
-        editor.renderer.scrollBarH && editor.renderer.scrollBarH.element,
+        editor.renderer.scrollBarV && editor.renderer.scrollBarV.inner,
+        editor.renderer.scrollBarH && editor.renderer.scrollBarH.inner,
         editor.textInput && editor.textInput.getElement()
     ].filter(Boolean), [400, 300, 250], this, "onMouseEvent");
     event.addMouseWheelListener(editor.container, this.onMouseWheel.bind(this, "mousewheel"));