Add new HID_Device_MillisecondElapsed() function to the HID device Class driver, to move the burden of managing the Idle period of each instance to the library and not the user application.

Demos/Device/ClassDriver/GenericHID/GenericHID.c

@@ -118,8 +118,7 @@ void EVENT_USB_UnhandledControlPacket(void)
 /** ISR to keep track of each millisecond interrupt, for determining the HID class idle period remaining when set. */
 ISR(TIMER0_COMPA_vect, ISR_BLOCK)
 {
-	if (Generic_HID_Interface.State.IdleMSRemaining)
-	  Generic_HID_Interface.State.IdleMSRemaining--;
+	HID_Device_MillisecondElapsed(&Generic_HID_Interface);
 }
 
 /** HID class driver callback function for the creation of HID reports to the host.