WIP : Settings redesign

We're reworking the settings to help users find what they're looking for! If there are any settings you find confusing, please mention them here.

Github PR link : https://github.com/opendatakit/collect/pull/1066

Check out the great progress that @Shobhit_Agarwal has made! There's a little bit more to be done to get fonts and colors consistent but the plan is to include this improvement in the next release.

If you have any suggestions, please comment!