Fix browser back button (#17627)

Fix browser back button

core/src/main.js

@@ -35,4 +35,11 @@ import { registerAppsSlideToggle } from './OC/apps'
 $(document).ready(function() {
 	initCore()
 	registerAppsSlideToggle()
+
+	// fallback to hashchange when no history support
+	if (window.history.pushState) {
+		window.onpopstate = _.bind(OC.Util.History._onPopState, OC.Util.History)
+	} else {
+		$(window).on('hashchange', _.bind(OC.Util.History._onPopState, OC.Util.History))
+	}
 })