Fix widget parameters from being nullified preventing widget closing

[0aveRyan]

Fixing bug from Issue #11.

Widget was echoing $args for before_widget and after_widget, however $args was set to null and reused for $args being passed through widget to display DoubleClick position. This meant the first

was generated, however the closing tag was no longer available, hence this widget ingesting all the others.

Set array for DFW args to be $dfw_args to avoid conflict.