The new clutter screen (e.g. sudo authentication screen); theming is not conform!

[gaetan-1960]

When I use whatever theme in Cinnamon, and use the clutter sudo authentication window (dimming the background), it follows it's OWN theming, never adapts to any them, EXCEPT for the "Gates-Clear-ice' and the 'Gates-snow-ice' theme; there it DOES FOLLOW the theme nicely, adapting it's window nicely! .. No other theme does this; seems odd I think, weird.
The Clutter based (authentication) screen should follow theming for all themes I think.
THanks.