页面加lightning样式，开始询价LWC组件修改，补充controller

liangxiaozhen

2023-08-08 c69e36a64e4954b0b7e818843e8a833b3201ec29

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<template>
    <div class="CancelSubmitHolder" if:true={IsLoading}>
        <lightning-spinner alternative-text="Loading" size="medium"></lightning-spinner>
        <lightning-button label="Show Toast" onclick={handleSuccess}></lightning-button>
    </div>
    
</template>