Feature Request: Theming Support

[herwix]

What you expected to happen

While using the app there are some layout errors that should be fixed. Because this is quiet time consuming to make the perfect layout, it would be nice to have some easy way to fix the layout with some custom theming options or at lest the ability to inject some custom markup. The community could share improvements and themes which would help the maintainer of the app to focus on other things. I get that this will be a security concern (code injection) so this should only be an admin feature.

What actually happened

Steps to reproduce

Is this on sandstorm?

yes