修复w-grid-select组件设置模型值，显示值未更新的问题。

io.sc.platform.core.frontend/src/platform/components/select/WGridSelect.vue

@@ -233,7 +233,9 @@ watch(
     if (newVal !== oldVal) {
       fieldMethodsClass.updateValue(newVal);
     }
-    if (!modelObjectValue.value || (modelObjectValue.value.length === 0 && newVal !== oldVal)) {
+    if (Tools.isEmpty(newVal)) {
+      fieldMethodsClass.clearObjectValue();
+    } else if (newVal !== oldVal) {
       setObjectValueByValue(newVal);
     }
   },
@@ -242,6 +244,7 @@ watch(
 // 根据实际值设置显示值
 const setObjectValueByValue = async (value) => {
   if ((Array.isArray(value) && value.length > 0) || (typeof value === 'string' && !Tools.isEmpty(value))) {
+    fieldMethodsClass.clearObjectValue();
     const urlSearchParams = new URLSearchParams();
     urlSearchParams.append(
       'criteria',
@@ -257,12 +260,10 @@ const setObjectValueByValue = async (value) => {
     if (resp && resp.data) {
       const responseData = resp.data;
       if (Array.isArray(responseData) && responseData.length > 0) {
-        fieldMethodsClass.clearObjectValue();
         responseData.forEach((item) => {
           modelObjectValue.value.push({ value: item[valueUseColumnName], displayValue: getActualDisplayValue(item) });
         });
       } else if (typeof responseData === 'object' && responseData.content?.length > 0) {
-        fieldMethodsClass.clearObjectValue();
         responseData.content.forEach((item) => {
           modelObjectValue.value.push({ value: item[valueUseColumnName], displayValue: getActualDisplayValue(item) });
         });