Merge pull request #4740 from metabase/non-root-path-v2

.../metabase/admin/settings/components/SettingsSetupList.jsx

.../metabase/admin/settings/components/SettingsSlackForm.jsx

...admin/settings/components/widgets/CustomGeoJSONWidget.jsx

.../admin/settings/components/widgets/PublicLinksListing.jsx

frontend/src/metabase/app-main.js

frontend/src/metabase/app.js

frontend/src/metabase/components/Logs.jsx

frontend/src/metabase/css/query_builder.css

frontend/src/metabase/dashboard/components/DashCard.jsx

...rc/metabase/dashboard/containers/DashboardEmbedWidget.jsx

...d/src/metabase/home/components/NewUserOnboardingModal.jsx

frontend/src/metabase/home/components/NextStep.jsx

frontend/src/metabase/home/components/Smile.jsx

frontend/src/metabase/icon_paths.js

frontend/src/metabase/lib/api.js

frontend/src/metabase/lib/cookies.js

frontend/src/metabase/lib/urls.js

...nd/src/metabase/public/components/widgets/SharingPane.jsx

frontend/src/metabase/pulse/components/WhatsAPulse.jsx

...metabase/query_builder/components/QueryDownloadWidget.jsx