DESIGN-4355 feat: tooltip提示异步获取

src/base/single/0.single.js

@@ -33,8 +33,10 @@ BI.Single = BI.inherit(BI.Widget, {
         var title = this.getTitle();
 
         if (title instanceof Promise) {
+            this.requestingTitle = title;
             title.then(resolvedTitle => {
-                this.mouseOver && showToolTip(this._getTooltipOptions(resolvedTitle));
+                //  由于是异步的,所以无法避免Promise resolve时机问题,所以设计为:鼠标移出了则不显示,并且只显示最后一次发起的查询结果
+                this.mouseOver && this.requestingTitle === title && showToolTip(this._getTooltipOptions(resolvedTitle));
             });
         } else {
             showToolTip(this._getTooltipOptions(title));