Set a few common properties for the given application if
we are running under MacOS.
Usage Example:
if (MacOSUtil.isMacOS()) {
MacOSUtil.setMacOS("JabaDex");
}
System.setProperty("apple.laf.useScreenMenuBar", "true");
System.setProperty("apple.awt.showGrowBox", "true");
System.setProperty("com.apple.mrj.application.apple.menu.about.name",
appName);