Fix infographic distortion and add plugin options (resizable, width, and height)

The infographic panel became distorted after we added the ability to resize plugin panels. This branch changes the following:

* Infographic panels are now attached at the same level as the main panel and now includes the plugin window frame.
* Infographic screen cannot be resized.
* Plugins can specify a custom `width` and `height` (default: width 300px, default height: 400px)
* Plugins can disable resize feature by setting their `resizable` property to false.