fix(admin-ui): Apply max dimensions to relation asset preview

Fixes #2320

packages/admin-ui/src/lib/core/src/shared/dynamic-form-inputs/relation-form-input/asset/relation-asset-input.component.scss

@@ -1,6 +1,8 @@
 .preview {
     cursor: pointer;
     border-radius: var(--border-radius);
+    max-width: 100px;
+    max-height: 100px;
 }
 
 .detail {