Merge pull request #4563 from taojianjian32/me1

固定高度的表格展开的时候重新计算表格高度，判断是否该出现滚动条

src/components/table/table.vue

@@ -529,6 +529,10 @@
                 const status = !data._isExpanded;
                 this.objData[_index]._isExpanded = status;
                 this.$emit('on-expand', JSON.parse(JSON.stringify(this.cloneData[_index])), status);
+                
+                if(this.height){
+                    this.$nextTick(()=>this.fixedBody());
+                }
             },
             selectAll (status) {
                 // this.rebuildData.forEach((data) => {