Resolve "Allow creating an I2C address"

Closes #3 (closed)

fpga_device_manager/windows/main_window.py

@@ -138,6 +138,8 @@ class MainWindow(BaseWindow):
         Saves the current device configuration.
         :param filename: Name of file to save to
         """
+        self.refresh()
+
         try:
             Config.save(filename)
             self.clear_dirty()