RFC: ui: refactor style handling #524

Job	Run time
build (ubuntu-latest)	2m 24s
build (ubuntu-latest, --disable-curses)	2m 18s
build (ubuntu-latest, --disable-lua)	2m 12s
build (ubuntu-latest, --disable-tre)	2m 16s
build (ubuntu-latest, --disable-selinux)	2m 38s
build (ubuntu-latest, --disable-acl)	2m 44s
build (ubuntu-latest, --disable-help)	3m 31s
build (ubuntu-20.04)	2m 21s
build (ubuntu-20.04, --disable-curses)	2m 40s
build (ubuntu-20.04, --disable-lua)	3m 5s
build (ubuntu-20.04, --disable-tre)	2m 22s
build (ubuntu-20.04, --disable-selinux)	2m 57s
build (ubuntu-20.04, --disable-acl)	2m 20s
build (ubuntu-20.04, --disable-help)	2m 23s
	36m 11s

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