clean deleted pointers

BUG: 399085

GIT_SILENT

BUG: 398587

Instead of showing in the hamburger menu, have them shown by the menu
button.
This is useful as our PackageKit management tooling is pretty bad and
some distros had ad-hoc UI for it.

PackageKit gives us different ids for the source, so we can't reliably
filter.

BUG: 388917

BUG: 390569

Remove unneeded logic on the delegate
Fix filtering condition

Do it from the model rather than the delegate

Put the name of the resource as the object name

Made sure that after cleaning the cache everything is populated again

No need to call functions twice, we can just as well pass directly the
information to the resource.

Some applications lost it over time

Fallback into daily refreshes otherwise

Makes for a quicker display of the initial page. The code is already adapted
to the use-case as we do the same when opening by uri.

BUG: 398236

Otherwise it complains nasty

Not all of them should be, also don't have them appear after upgrading
it because it needs a reboot.

It's perfectly fine when a device is already up to date

For now let's just offer the message that fwupd provides, we can offer
our own translations eventually.

Don't return boolean for the fun of it.
If we have a local path, just put it in a QString, don't keep going back
and forth from QUrl as if it could have become magically a remote URL.

It doesn't make sense, conceptually, to uninstall a firmware.

No need to return values only to catch them and print a debug message.
Make sure when we fail instead, we do set the status to failed so the UI
can react.

Write them to disk as they come.

Sometimes it returns empty

The version is not always enough.
Just show it when it's actually the same package we are talking about.
The use-case explained in phabricator should remain the same.

CCMAIL: nate@kde.org

Makes for better output in debugging tools (e.g. address sanitiser)

BUG: 396833