Please add the following features

[antileks]

To be able to fully use your application, the following features are missing:

1. I would like to be able to change the text on the buttons. My project is localized in many languages ​​and without this opportunity it is impossible to use your add-on.
2. I would like to be able to change the color of texts and backgrounds. So I can completely customize the interface for yourself. In particular, I need to replace the color of the buttons and the background under the buttons. It would be ideal to be able to load a custom template.
3. I would like to be able to limit the number of selectable contacts.
4. Add support for AndroidX.