Merge pull request #7318 from dataease/pr@dev@fix_mult_required_tips

fix: 多选下拉过滤器必填时空值没有提示

core/frontend/src/components/widget/deWidget/DeSelect.vue

@@ -145,7 +145,7 @@ export default {
       return this.element.serviceName === 'textSelectWidget' && this.element.options.attrs.selectFirst
     },
     showRequiredTips() {
-      return this.inDraw && this.element.options.attrs.required && !this.value
+      return this.inDraw && this.element.options.attrs.required && (!this.value || this.value.length === 0)
     }
   },