手动注册改自动注册，将会造成瞬间不可用的问题

手动注册改自动注册，置空执行器列表直接update到数据库了，导致自动注册线程下次更新前无可用列表

xxl-job-admin/src/main/resources/static/js/jobgroup.index.1.js

@@ -134,7 +134,7 @@ $(function() {
 		if (addressType == 0) {
 		if (addressType == 0) {
             $addressList.css("background-color", "#eee");	// 自动注册
             $addressList.css("background-color", "#eee");	// 自动注册
             $addressList.attr("readonly","readonly");
             $addressList.attr("readonly","readonly");
-			$addressList.val("");
+			//$addressList.val("");
 		} else {
 		} else {
             $addressList.css("background-color", "white");
             $addressList.css("background-color", "white");
 			$addressList.removeAttr("readonly");
 			$addressList.removeAttr("readonly");