OS_SETTING_SHUFFLE_PIN does not work for digits from 5-th to 8-th

[hebasto]

The goal of the PIN shuffling is to mitigate the possibility that someone is observing my movements and inferring digits from the number of button presses. So, upon activation of the PIN shuffle in the Nano S global settings, PIN entry should start with a random number for each digit. But ';' is the start symbol for all digits from 5-th to 8-th.