fix(editor): Fix broken element-plus loading spinner (no-changelog) (#7817)

<img width="976" alt="image"
src="https://github.com/n8n-io/n8n/assets/6179477/aea8a4c8-277e-4527-b6e9-a5c3427097b6">
<img width="117" alt="image"
src="https://github.com/n8n-io/n8n/assets/6179477/14c8876c-5e26-4154-9fdf-8b1fe9e5f806">

packages/editor-ui/src/composables/useLoadingService.ts

@@ -19,7 +19,6 @@ export function useLoadingService() {
 		loadingService.value = Loading.service({
 			lock: true,
 			text: text || i18n.baseText('genericHelpers.loading'),
-			spinner: 'el-icon-loading',
 			background: 'var(--color-dialog-overlay-background)',
 		}) as unknown as LoadingService;
 	}