Merge branch 'master' into 3-update-mirador

src/components/ChangeThemeDialog.js

src/components/CollectionDialog.js

src/components/CompanionWindowFactory.js

src/components/GalleryViewThumbnail.js

src/components/LabelValueMetadata.js

src/components/LocalePicker.js

src/components/ManifestRelatedLinks.js

src/components/OpenSeadragonViewer.js

src/components/PrimaryWindow.js

src/components/SearchPanelNavigation.js

src/components/SearchResults.js

src/components/SidebarIndexItem.js

src/components/SidebarIndexTableOfContents.js

src/components/ThumbnailNavigation.js

src/components/VideoViewer.js

src/components/Window.js

src/components/WindowSideBar.js

src/components/WindowSideBarButtons.js

src/components/WindowSideBarCanvasPanel.js

src/components/WindowSideBarCollectionPanel.js