BI-91705 fix: MultiLayerDownListPopup限制下高度，与DownListPopup保持一致

src/widget/multilayerdownlist/popup.downlist.js

@@ -107,7 +107,8 @@ BI.MultiLayerDownListPopup = BI.inherit(BI.Pane, {
                             }]
 
                         },
-                        innerVGap: 5
+                        innerVGap: 5,
+                        maxHeight: 378,
                     };
                     self._createChildren(item);
                 } else {
@@ -319,4 +320,4 @@ BI.MultiLayerDownListPopup = BI.inherit(BI.Pane, {
 
 BI.MultiLayerDownListPopup.EVENT_CHANGE = "EVENT_CHANGE";
 BI.MultiLayerDownListPopup.EVENT_SON_VALUE_CHANGE = "EVENT_SON_VALUE_CHANGE";
-BI.shortcut("bi.multi_layer_down_list_popup", BI.MultiLayerDownListPopup);
+BI.shortcut("bi.multi_layer_down_list_popup", BI.MultiLayerDownListPopup);