Feature Request: Prevent sleep until done sync'ing

Often when I am bulk syncing or importing items, I then turn on my ios devices (tablets, phones) to allow them to catch up with the changes. I know there is an option to “keep powered on while app is running” but it sure would be nice if we could have the option to “keep powered on until this sync finishes” which may take ~1-2 hours for a large import, but then can sleep the program and save battery life on the device. Several times I have not been around my charger and the device has gone completely out of battery, but that was just because the mylio program finished syncing and continued keeping the device powered up until batteries were exhausted.