ui: move backup group owner changer into window folder

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

www/window/BackupGroupChangeOwner.js

@@ -0,0 +1,47 @@
+Ext.define('PBS.BackupGroupChangeOwner', {
+    extend: 'Proxmox.window.Edit',
+    alias: 'widget.pbsBackupGroupChangeOwner',
+
+    submitText: gettext("Change Owner"),
+    subject: gettext("Change Owner"),
+
+    initComponent: function() {
+	let me = this;
+
+	if (!me.datastore) {
+	    throw "no datastore specified";
+	}
+	if (!me.backup_type) {
+	    throw "no backup_type specified";
+	}
+	if (!me.backup_id) {
+	    throw "no backup_id specified";
+	}
+
+	Ext.apply(me, {
+	    url: `/api2/extjs/admin/datastore/${me.datastore}/change-owner`,
+	    method: 'POST',
+	    items: {
+		xtype: 'inputpanel',
+		onGetValues: function(values) {
+		    values["backup-type"] = me.backup_type;
+		    values["backup-id"] = me.backup_id;
+		    return values;
+		},
+
+		column1: [
+		    {
+			xtype: 'pbsAuthidSelector',
+			name: 'new-owner',
+			value: me.owner,
+			fieldLabel: gettext('Owner'),
+			minLength: 8,
+			allowBlank: false,
+		    },
+		],
+	    },
+	});
+
+	me.callParent();
+    },
+});