[Merge] lp:~dandrader/qtubuntu/loggingFixes into lp:qtubuntu

[Daniel d'Andrada]

> +    case mir_event_type_input_device_state:
> +        return "mir_event_type_input_device_state";
>      default:
> return "invalid";
> 
> this is why I try to avoid "default" for these cases - entries added to the
> Mir enum aren't noticed by us. Does it compile if you remove the "default"?
> 

Yes. Updated.
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https://code.launchpad.net/~dandrader/qtubuntu/loggingFixes/+merge/305374
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