Make GIS adaptive

Epic: https://source.puri.sm/Librem5/use-cases/issues/83, https://source.puri.sm/Librem5/use-cases/issues/68

GNOME Initial Setup (GIS) should follow the same screens and behaviors as PureOS has but it will need to be made adaptive to make sure GIS looks nice on the phone.

Edited May 13, 2019 by Heather Ellsworth

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