[Request] Add option to disable screen dimming (idle timer)

[L1ghtmann]

With low power mode enabled, the screen has to be tapped every couple of minutes 30s to reset the idle timer to prevent the device from sleeping. Though this is typically only an issue when waiting for long commands to complete (e.g., extracting sdks for Theos), I think it would be useful to have the option to disable it nevertheless.

Implementing it should be as simple as running [[UIApplication sharedApplication] setIdleTimerDisabled:YES];.

Thanks for your consideration and continued work on this awesome project!