I love the plugin that you have based this on: CMS Page Tree View
So great seeing people taking it to the next level, especially because the original plugin is not maintained anymore, I think.

Is there a way to load the page tree in a floating windows within WordPress?
It would be so awesome to have a button in the top bar of WordPress to access a page or post tree with just one click.
On large sites it can be so time consuming to have to access the page view on a separate page before being able to click “edit”. It would be amazing to load a page tree view into a modal window for quick access.

What do you think? Can this be done using the WordPress native modal windows within the backend? Is there a way to just isolate the plugins page tree and show it in an iframe for example?