/* The standard status bar is 20 pixels. The navigation bar extends 20 pixels up so it is overlapped by the status bar.
* When there is a larger than 20 pixel status bar (e.g. a phone call is in progress or GPS is active), the center needs
* to shift up 20 pixels to avoid this 'dead space' being visible above the usual nav bar.
*/
if (statusBarHeight > 20)
{
statusBarHeight -= 20;
}