Fix copy data folder when performing save as operation

Changed the location where the variable `folder` gets updated. The
function `getDataFolder()` uses this variable to return the data folder.
It was looking for the data folder of the original sketch in the folder
of the new created sketch.
Furthermore the data folder will now be created if it does not exist yet
in the new sketch before copying the files of the original sketch.

arduino-core/src/processing/app/Sketch.java

@@ -351,13 +351,22 @@ public void saveAs(File newFolder) throws IOException {
         file.saveAs(new File(newFolder, file.getFileName()));
     }
 
-    folder = newFolder;
 
     // Copy the data folder (this may take a while.. add progress bar?)
     if (getDataFolder().exists()) {
       File newDataFolder = new File(newFolder, "data");
+      // Check if data folder exits, if not try to create the data folder
+      if (!newDataFolder.exists() && !newDataFolder.mkdirs()) {
+        String msg = I18n.format(tr("Could not create directory \"{0}\""), newFolder.getAbsolutePath());
+        throw new IOException(msg);
+      }
+      // Copy the data files into the new folder
       FileUtils.copy(getDataFolder(), newDataFolder);
     }
+
+    // Change folder to the new folder
+    folder = newFolder;
+
   }
 
   /**