When multiple quicksaves occurred in quick succession, the numeric order
of the saves could not be guaranteed. To prevent players from getting
confused as to why their saves appear out of order, don't number them.
With more than 1 quicksave slot, slots will be created each time you
quicksave until the maximum number (configured in settings) of
quicksaves has been reached. After that, the oldest quicksave slot will
be replaced each time you quicksave. Saves are numbered sequentially,
unless the maximum number of slots is 1, in which case it is not numbered.