Do not ship a daily build

[Pander]

When opening Thunderbird 31.8.0 (1:31.8.0+build1-0ubuntu0.15.04.1) it tells me:

"Welcome to Daily!

Congratulations! You've downloaded or compiled a Daily build of Thunderbird. These are the builds that contain the latest additions and changes to Thunderbird.
The QA Team Needs You

Help our QA team improve this version of Thunderbird, see our wiki for more details
Submit a Bug

If you notice any problems, please file a bug using these instructions.
Submit Crash Reports

Please use the Crash Reporter when Daily crashes. It gives us valuable data on the most serious crashes and how people encounter them. 'Tell Mozilla' must be checked, and add a comment before you click 'Restart' or 'Quit'. An email address is also useful if we need to contact you for more details.
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Get Involved! You don't have to be technical and being involved is good for people wanting to get more familiar with Thunderbird."

Either do not ship a daily build or update the text so people are not confused and can read they are using a stable build.

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.