Create ranges from Range String

Hi

I'm super happy that I found this app ! I just said to myself some minutes ago "It would be great to create an Electron based app to edit ranges, with custom colors and export feature" and ... here it is ! 
Almost perfect for me.

Almost perfect; as I miss a feature: I'd need to initialize ranges by pasting Range String text (ex: `ATo+, QQ+, A9s+`)

Thanks !