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/routes/albums/[albumId]/index.svelte

@@ -44,4 +44,6 @@
 	<title>{album.albumName} - Immich</title>
 </svelte:head>
 
-<AlbumViewer {album} />
+<div class="relative immich-scrollbar">
+	<AlbumViewer {album} />
+</div>