BI-73804 fix: 全选不使用assist直接从items取

src/component/allvaluechooser/combo.allvaluechooser.js

@@ -53,10 +53,11 @@ BI.AllValueChooserCombo = BI.inherit(BI.AbstractAllValueChooser, {
 
     getValue: function () {
         var val = this.combo.getValue() || {};
-        if (val.type === BI.Selection.All) {
-            return val.assist;
+        if (val.type === BI.Selection.Multi) {
+            return val.value || [];
         }
-        return val.value || [];
+
+        return BI.difference(BI.map(this.items, "value"), val.value || []);
     },
 
     populate: function (items) {