fix issue with locale extension builds

src/editor/extensions/ext-polygon/ext-polygon.js

@@ -5,7 +5,20 @@
  * @copyright 2010 CloudCanvas, Inc. All rights reserved
  *
  */
-import {loadExtensionTranslation} from '../../locale.js';
+
+const loadExtensionTranslation = async function (lang) {
+  let translationModule;
+  try {
+    // eslint-disable-next-line node/no-unsupported-features/es-syntax
+    translationModule = await import(`./locale/${lang}.js`);
+  } catch (_error) {
+    // eslint-disable-next-line no-console
+    console.error(`Missing translation (${lang}) - using 'en'`);
+    // eslint-disable-next-line node/no-unsupported-features/es-syntax
+    translationModule = await import(`./locale/en.js`);
+  }
+  return translationModule.default;
+};
 
 export default {
   name: 'polygon',
@@ -15,7 +28,7 @@ export default {
     const {$} = S, // {svgcontent}
       // addElem = svgCanvas.addSVGElementFromJson,
       editingitex = false;
-    const strings = await loadExtensionTranslation('polygon', svgEditor.curPrefs.lang);
+    const strings = await loadExtensionTranslation(svgEditor.curPrefs.lang);
     let selElems,
       // svgdoc = S.svgroot.parentNode.ownerDocument,
       // newFOG, newFOGParent, newDef, newImageName, newMaskID, modeChangeG,