Geo UI polish

I am having a few visual annoyances.

Use geo-nodes sprite icon

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Screen_Shot_2017-12-21_at_16.39.27 Screen_Shot_2017-12-21_at_16.37.21

(I didn't change the 🌍 at the orange arrow, I'm just pointing at it because now it's clearer that globe indicates the project is public and there is no longer a confusion with the globe icons used for Geo)

Make HTTP warning orange

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