if the predecessor series id set at the series form, the list of events
includes the predecessor dates. This can help to get an overview, if the
series moved to another project or studio, or editors change continue
their work in another series.
check if attributes for uploaded audio match expected ranges and mark
them by colors to help finding issues with duration, channels, RMS, mode
(CBR, ABR), bitrate.
increase upload limit to 400 MB for audio
