Allows for setting a per-user profile PIN that must be entered to switch
to the user. The PIN is a sequence of directional buttons, ie D-Pad
left/right/up/down.
This PIN is per device per user per server. The PIN is stored locally
and not sent nor shared with the server. If you forget your PIN, can
still access the app using server credentials which also removes the
PIN.
Additionally, there is another setting to disable automatically sign in.
When enabled (default) the last user is automatically restored, even if
there is a PIN. If disabled, a server & user must always be selected
when opening the app.
Closes#268Closes#321
