fix: support DS translation modal dropdowns

Author: tischsoic

src/bundle/Resources/public/js/scripts/admin.location.add.translation.js

@@ -18,12 +18,16 @@
     };
 
     doc.querySelectorAll('.ibexa-translation__language-wrapper--language').forEach((select) => {
-        const dropdown = select.closest('.ibexa-dropdown');
+        const dropdown = select.closest('.ibexa-dropdown, .ids-dropdown');
         const observer = new MutationObserver(() => toggleBtnDisabledState(select));
 
         toggleBtnDisabledState(select);
         select.addEventListener('change', ({ target }) => toggleBtnDisabledState(target), false);
 
+        if (!dropdown) {
+            return;
+        }
+
         observer.observe(dropdown, observerConfig);
     });
 })(window, window.document);