Merge branch 'sprint/sunhao/optimize_program_list' into 'master'

* optimize program list, support to preserve nested state.

See merge request easycorp/zentaopms!4010

module/program/view/browsebylist.html.php

@@ -1,5 +1,5 @@
 <?php $canOrder = (common::hasPriv('program', 'updateOrder') and strpos($orderBy, 'order') !== false)?>
-<form class='main-table' id='programForm' method='post' data-ride='table' data-nested='true' data-expand-nest-child='false' data-checkable='false' data-enable-empty-nested-row='true' data-replace-id='programTableList'>
+<form class='main-table' id='programForm' method='post' data-ride='table' data-nested='true' data-expand-nest-child='false' data-checkable='false' data-enable-empty-nested-row='true' data-replace-id='programTableList' data-preserve-nested='true'>
   <table class='table has-sort-head table-fixed table-nested' id='programList'>
     <?php $vars = "status=$status&orderBy=%s";?>
     <thead>
@@ -133,6 +133,10 @@ $(function()
         selector: 'tr',
         dragCssClass: 'drag-row',
         trigger: $list.find('.sort-handler').length ? '.sort-handler' : null,
+        before: function(e)
+        {
+            if($(e.event.target).closest('a,.btn').length) return false;
+        },
         canMoveHere: function($ele, $target)
         {
             return $ele.data('parent') === $target.data('parent');