Trigger a BDPLUS_RUN_CONVTAB event to force convtab generation

Certain media players which offer an option to directly play playlist
items; in that case, no convtab is generated beforehand.
This fixes this case.
4 jobs for doom9-bdplus2 in 1 minute and 20 seconds (queued for 2 seconds)
latest
Status Job ID Name Coverage
  Build
passed build-debian #410381
amd64 debian

00:00:28

passed build-macos #410382
macos

00:00:59

passed build-win32 #410384
amd64 docker

00:01:17

passed build-win64 #410383
amd64 docker

00:01:20