Pull request #3175: 无jira fix: less中 .hover-visible mixin也处理一下combo

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

* commit 'e9813d5f97f700579d3cf3f5cd15ed96ffb4d88b':
  无jira fix: less中 .hover-visible mixin也处理一下combo

src/less/visual.less

@@ -339,7 +339,7 @@
 }
 
 .hover-visible(@cls) {
-  & .@{cls} {
+  & .@{cls}:not(.bi-combo-popup) {
     visibility: hidden;
   }
   &:hover {