webui: fix modal window

one/static/style/wizard.less

@@ -15,15 +15,17 @@
     min-width: 500px;
     position: fixed;
     left:50%;
-    top:50%;
+    top:100px;
     margin-left: -270px;
-    margin-top: -200px;
+    margin-top: 0;
     min-height: 50px;
     background-color: #fff;
     border-radius: 4px;
     padding: 20px;
     box-shadow: 0 0 30px rgba(0,0,0,0.4);
     border: 1px solid #333;
+    max-height: 60%;
+    overflow: auto;
     .container{
         max-height: 400px;
         overflow: auto;