feat(mobile): add settings mobile page with swiper functionality

[josephmcg]

What this PR does 📖

• consolidate settings render store values (showSidebar && settingsRoute). just render if settingsRoute has value
• move styles from base.less into component
• consolidate AsideMenu component into SettingsSidebar. It was probably intended to be generic, but became very specialized. simpler to combine them
• remove unused mutations and store values in 'ui'
• render mobile settings as a separate page rather than modal. still takes advantage of the same modal code (page components)

Which issue(s) this PR fixes 🔨
AP-1885

Special notes for reviewers 🗒️

• it's not exactly perfect yet, but its better than before

Additional comments 🎤