Builder|Debian: Mark package changelogs as released

Hopefully this will now allow me to upload stable releases to
a Launchpad PPA.
qmake|Ubuntu: Do not install apt repository with package

This was a questionable feature. I would rather have a PPA that the
user can easily add to their apt config if they wish.
Fixed|Console|UI: Crash when using autocompletion

The logic for reshowing the completion popup was incomplete.

This commit fixes #1645.