ui: expose the s3 client view in the navigation tree

Add a `S3 Clients` item to the navigation tree to allow accessing the
S3 client configuration view and edit windows.

Adds the required source files to the Makefile.

Signed-off-by: Christian Ebner <c.ebner@proxmox.com>
Signed-off-by: Thomas Lamprecht <t.lamprecht@proxmox.com>

www/Makefile

@@ -61,6 +61,7 @@ JSSRC=							\
 	config/RemoteView.js				\
 	config/TrafficControlView.js			\
 	config/ACLView.js				\
+	config/S3ClientView.js				\
 	config/SyncView.js				\
 	config/VerifyView.js				\
 	config/PruneView.js				\
@@ -85,6 +86,7 @@ JSSRC=							\
 	window/PruneJobEdit.js				\
 	window/GCJobEdit.js				\
 	window/UserEdit.js				\
+	window/S3ClientEdit.js				\
 	window/Settings.js				\
 	window/TokenEdit.js				\
 	window/VerifyJobEdit.js				\

www/NavigationTree.js

@@ -80,6 +80,12 @@ Ext.define('PBS.store.NavigationStore', {
                         path: 'pbsSubscription',
                         leaf: true,
                     },
+                    {
+                        text: gettext('S3 Remotes'),
+                        iconCls: 'fa fa-cloud-upload',
+                        path: 'pbsS3ClientView',
+                        leaf: true,
+                    },
                 ],
             },
             {