Pull request #1735: 无jira任务，修复bubblePopup下的popup的阴影无效的问题

Merge in VISUAL/fineui from ~GUYI/fineui:master to master

* commit 'f055bf687823a20b05cfc6f04ce6159121ea4c28':
  无jira任务，修复bubblePopup下的popup的阴影无效的问题

src/less/base/combo/popup.bubble.less

@@ -3,7 +3,8 @@
 .bi-bubble-popup-view {
   .box-shadows(0px 9px 28px 8px rgba(0, 0, 0, 0.05), 0px 6px 16px 0px rgba(0, 0, 0, 0.08), 0px 3px 6px -4px rgba(0, 0, 0, 0.12));
 
-  &.bi-popup-view .list-view-shadow {
+  // 只去掉bubble-popup子元素的阴影
+  &.bi-popup-view > .list-view-shadow {
     .box-shadow(none);
   }
 }