Playground: Allow to import the theme code or something to keep editing the theme in multiple devices or in future.

[MiniSuperDev]

Hello, Like you allow to copy the theme code, it would nice to have a way to import the config to allow edit the theme in the playground in multiples devices or in future if a person want to change something, He only upload or import the current config, and he can continuous editing in the playground.

It should also support all the custom modifications that have been made to the properties, it does not mean that you have to have an interface to edit them if they are not currently in the playground, but it does mean that they are used and when exported they are also there.

Thanks