mc-tool: make help consistent about supported types
mc-tool: make help consistent about supported types

Also, make it a bit more readable, and avoid the lines wrapping.

freedesktop-unofficial-mirror/telepathy__telepathy-mission-control,freedesktop-unofficial-mirror/telepathy__telepathy-mission-control,freedesktop-unofficial-mirror/telepathy__telepathy-mission-control,freedesktop-unofficial-mirror/telepathy__telepathy-mission-control