Available since version: Gideros 2011.6
Controls the screen dimming and device sleeping of the device. When the application has no touches as user input for some period,
the system puts the device into a sleep state where the screen dims. However some applications have no input and controlled
by accelerometer or gyroscope only. For these kind applications, the screen should be kept awake by calling this function
<li>*Note:** This function has no effect on desktop.</li>
- keepAwake: (boolean) if true, screen is kept awake.
application:setKeepAwake(true) -- disable screen dimming and device sleeping
application:setKeepAwake(false) -- enable screen dimming and device sleeping