fix #3058: ui: improve remote edit UX by clarifying ID vs host

also fixup missing emptyText for fingerprint (adapted from PVE's PBS
storage addition) and code-style in surrounding areas a bit

Signed-off-by: Thomas Lamprecht <t.lamprecht@proxmox.com>

www/config/RemoteView.js

@@ -116,7 +116,7 @@ Ext.define('PBS.config.RemoteView', {
 
     columns: [
 	{
-	    header: gettext('Remote'),
+	    header: gettext('Remote ID'),
 	    width: 200,
 	    sortable: true,
 	    renderer: Ext.String.htmlEncode,

www/config/SyncView.js

@@ -196,7 +196,7 @@ Ext.define('PBS.config.SyncJobView', {
 	    sortable: true,
 	},
 	{
-	    header: gettext('Remote'),
+	    header: gettext('Remote ID'),
 	    dataIndex: 'remote',
 	    width: 120,
 	    sortable: true,