Update build (npm run prep now restored)

dist/extensions/ext-php_savefile.js

@@ -5,33 +5,41 @@ var svgEditorExtension_php_savefile = (function () {
   //   handler as in "ext-server_opensave.js" (and in savefile.php)
   var extPhp_savefile = {
     name: 'php_savefile',
-    init: function init(_ref) {
-      var $ = _ref.$;
-      var svgEditor = this;
-      var extPath = svgEditor.curConfig.extPath,
-          svgCanvas = svgEditor.canvas;
+
+    init({
+      $
+    }) {
+      const svgEditor = this;
+      const {
+        curConfig: {
+          extPath
+        },
+        canvas: svgCanvas
+      } = svgEditor;
       /**
        * Get file name out of SVGEdit document title.
        * @returns {string}
        */
 
       function getFileNameFromTitle() {
-        var title = svgCanvas.getDocumentTitle();
+        const title = svgCanvas.getDocumentTitle();
         return title.trim();
       }
 
-      var saveSvgAction = extPath + 'savefile.php';
+      const saveSvgAction = extPath + 'savefile.php';
       svgEditor.setCustomHandlers({
-        save: function save(win, data) {
-          var svg = '<?xml version="1.0" encoding="UTF-8"?>\n' + data,
-              filename = getFileNameFromTitle();
+        save(win, data) {
+          const svg = '<?xml version="1.0" encoding="UTF-8"?>\n' + data,
+                filename = getFileNameFromTitle();
           $.post(saveSvgAction, {
             output_svg: svg,
-            filename: filename
+            filename
           });
         }
+
       });
     }
+
   };
 
   return extPhp_savefile;