Is your feature request related to a problem? Please describe.

I find that the extension has a significant impact on my eyes when setting grey/whitelists. I could not find any other issue related to this, so I thought it could be something to be considered.

Describe the solution you'd like

Implement a inverted or dark color scheme for the extension UI.

**Describe alternatives y

The problem

Some embed scripts use data- attributes which clash with those used by klaro! - for example, one embed script I have come across has a data-type='inline' attribute, which breaks the script when it is changed to type='inline'.

Proposed solution

As hinted in aidantwoods/SecureHeaders#67 (comment), the public API could do with some better coverage.