Pull request #1730: QFX-3089 feat：气泡弹窗加上阴影，ie9+没有产生偏移

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

* commit 'd5f60b8476104c50c17be5eec327d9b513336563':
  QFX-3089 feat：气泡弹窗加上阴影，ie9+没有产生偏移

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

@@ -1,6 +1,9 @@
 @import "../../index";
 
-// ie下造成popup向下偏移
 .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 {
+    .box-shadow(none);
+  }
 }

src/less/visual.less

@@ -28,6 +28,12 @@
   -moz-box-shadow: @arguments;
 }
 
+.box-shadows(@shadow1, @shadow2, @shadow3) {
+  box-shadow: @shadow1, @shadow2, @shadow3;
+  -webkit-box-shadow: @shadow1, @shadow2, @shadow3;
+  -moz-box-shadow: @shadow1, @shadow2, @shadow3;
+}
+
 .background-color(@color, @alpha) {
   background-color: fade(@color, @alpha);
   @ieColor: argb(fade(@color, @alpha));