Fix rendering of custom attributes without icons (#9171)

Signed-off-by: Caranell <[email protected]>

Author: Caranell

plugins/setting-resources/src/components/ClassAttributeRow.svelte

@@ -53,7 +53,7 @@
   <button class="hulyTableAttr-content__row-dragMenu" on:click|stopPropagation={clickMore}>
     <IconMoreV2 size={'small'} />
   </button>
-  {#if attribute.icon !== undefined}
+  {#if attribute.icon !== undefined && attribute.icon !== null}
     <div class="hulyTableAttr-content__row-icon">
       <Icon icon={attribute.icon} size={'small'} />
     </div>