Use qCInfo for anything that has general value for support and
development. Use qCWarning for any recoverable error and qCCritical
for anything that could result in data loss or would identify a serious
issue with the code.
Issue #5647
This gives more insight about the logs and allow setting fine-tuned
logging rules. The categories are set to only output Info by default
so this allows us to provide more concise logging while keeping the
ability to extract more information for a specific category when
developping or debugging customer issues.
Issue #5647
The policy that was said is that if a notification has no action, the
client can and should display a close-button. This patch does it.
In additon to that, the client needs a blacklist of closed notifcations
otherwise they would re-appear next time the server notifications are
fetched again.
Also, changed the cleanup of not-longer-used widgets to be more robust.
