Archive page, archiving/unarchiving collections

frontend/src/metabase/css/core/colors.css

frontend/src/metabase/lib/redux.js

frontend/src/metabase/questions/collections.js

frontend/src/metabase/questions/components/ArchivedItem.jsx

frontend/src/metabase/questions/components/Item.jsx

...tend/src/metabase/questions/containers/AddToDashboard.jsx

frontend/src/metabase/questions/containers/Archive.jsx

...metabase/questions/containers/ArchiveCollectionWidget.jsx

...tend/src/metabase/questions/containers/CollectionList.jsx

...tend/src/metabase/questions/containers/CollectionPage.jsx

frontend/src/metabase/questions/containers/EditLabels.jsx

frontend/src/metabase/questions/containers/EntityBrowser.jsx

frontend/src/metabase/questions/containers/EntityList.jsx

frontend/src/metabase/questions/containers/LabelPopover.jsx

frontend/src/metabase/questions/containers/QuestionIndex.jsx

frontend/src/metabase/questions/containers/SearchResults.jsx

frontend/src/metabase/questions/containers/UndoListing.jsx

frontend/src/metabase/questions/questions.js

frontend/src/metabase/questions/selectors.js

frontend/src/metabase/reference/containers/ReferenceApp.jsx