Look and feel updates.

[MistakeNot4892]

• Changes colours of browser popups from green/blue to orange/grey-blue.
• Changes NanoUI backgrounds to use the terminal graphics from oldEuropa.
• Removes NT and syndicate logos.

TODO:

• [X] Finish tweaking NanoUI text colours.
• [X] Make the NanoUI background mask work nicer with the new graphics.

[MistakeNot4892]

Ready for review.

[Lohikar]

Did you delete the reference to the syndie background in nano's JS?

[MistakeNot4892]

No, why?

[Lohikar]

You probably should, given that you're deleting that asset.

[MistakeNot4892]

No I'm not.