Implement mechanism to remove and add shared user in album on web (#369)

* AFixed overlay issue of modal

* Added modal with existing user

* Added custom scrollbar to all pages

* Fixed Document is not define when access document DOM node in browswer

* Added context menu

* Added api to remove user from album

* Handle user leave album

* Added share button to non-shared album

* Added padding to album viewer:

* Fixed margin top of asset selection page

* Fixed issue cannot push to dockerhub

web/src/lib/components/shared-components/context-menu/menu.ts

@@ -0,0 +1,3 @@
+const key = {};
+
+export { key };