Camera not changing when option "Only select batteles..." is active and no preferred driver is in the race

[MerlinCooper]

[create-issue-branch[bot]]

Branch issue-111-Camera_not_changing_when_option_Only_select_batteles_is_active_and_no_preferred_driver_is_in_the_race created!

[MerlinCooper]

Added Feature that only battles of preferred drivers (#28) will be selected requires some more code to handle an empty list and the use-case that non of the drivers in the preffered driver list is racing.