bahrain 2020 1.12

Overall rework.
Base track is ac_bahrain, bahrain_2018 and bahrain_2019_spec.

_etc/ext_config.2018    turn off rock, podium light, ground light, water light and top light 2
_etc/screen_static.kn5  no animation
_etc/sector_f1.kn5      AC_TIME_?_? objects for F1 sector

jk
