Sys-botbase no longer inits fs or mounts the sd card. If you run a fork or adapt from sys-botbase then please make sure to yield the fs service once you're done with it to avoid hitting the too many sessions panic.
screenOn and screenOff once again turn on/off the backlight. Many thanks to SciresM for yielding atmosphère's lbl service session until required such that we can do the same here. Note that this only works with Atmosphère 1.3.1 onwards.