public static boolean showDialog(AppSettings sourceSettings, String imageFile, boolean loadSettings) {
        return showDialog(sourceSettings, getURL(imageFile), loadSettings);
    }
<code>SettingsDialog</code> displays a Swing dialog box to interactively
configure the <code>AppSettings</code> of a desktop application before
<code>start()</code> is invoked.

The <code>AppSettings</code> instance to be configured is passed to the
constructor.

@see AppSettings
@author Mark Powell
@author Eric Woroshow
@author Joshua Slack - reworked for proper use of GL commands.
jme3-awt-dialogs/src/main/java/com/jme3/awt/AWTSettingsDialog.java