With `set -x` we'll gather get good debugging info for the anticipated
failed Icedove -> Thunderbird migrations we expect in Tails 3.0. Note
that when Thunderbird is started via GNOME (e.g. Activities Overview
or Applications menu) its stdout/err is logged to the journal and thus
included in Whisperback reports.

Closes: #11997

FTR sajolida agrees.

We're already interested in people clicking this link :)

- "Individual" as an adjective can mean "Existing as a distinct entity; separate"
- Ikiwiki links work without / at the end and we never put them

refs: #11997

refs: #11997