Clean up Global Style settings configuration from project

[antonis]

Description

Cleanup of the Global Styles settings configuration by reapplying the changes in #15050 and wordpress-mobile/WordPress-FluxC-Android#2067

[peril-wordpress-mobile]

	Fails
🚫	Please add a type label to this issue. e.g. '[Type] Enhancement'

Generated by 🚫 dangerJS

[dangermattic]

Thanks for reporting! 👍