This is planned with our new toolkit called Dynamix Toolbox. It will feature dynamic and smart overlays that will give you the option to completely customise the themes, etc.
MixPlay wrapper is in progress and will be released as soon as I can get to it. I'll mark this as complete once the features are implemented. For now the toolbox is in experimental dev mode and you should only use it if you are a developer and know what you are doing.
Read our blogpost here:
UI is currently in conceptual phases.