Improvement suggestions

Hi,
my congrats for this useful plugin.
I have just some improvement suggestions.

1.
The code container bottom-right corner is not draggable, this makes code conteiner not resizable, wich is annoyng. It would be great to be able to change it’s size as it happens when the plugin is deactivated.

2.
It would be great to have a dark theme!
Who still codes with clear theme anyway? 😉

Thanks