[Merge] lp:~lukas-kde/qtubuntu/liveCaption into lp:qtubuntu

[Daniel d'Andrada]

> Should we append the application display name to the window title, as the
> QPlatformWindow::setWindowTitle suggests?

hmm... we might just leave it for a layer higher up, like unity8
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https://code.launchpad.net/~lukas-kde/qtubuntu/liveCaption/+merge/272756
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