cleanup DOM nodes on destroy

[baptistebriel]

Hello,

First of all, thanks for the plugin! I'm working on a SPA will lots of custom <select> elements and came across a few issues... Related to #23, I'll bring some more details here hoping that it will get fixed soon.

My biggest issue is that after navigating through the website, the previously used selects aren't removed from the DOM. I also noticed there was a few addEventListener using anonymous functions; using a named function would allow us to call the removeEventListener after that. This would help with GC & memory leaks.

Pretty long list, right? And my computer screen wasn't long enough 😅

Also, all of theses nodes have a transform property applied; that will create a new GraphicsLayer for each one of them, which could be quite dangerous..

Let me know if I can help in any way, I'd be happy to do so.