It seems to be a crash some people get sometimes, better safe than
sorry.

BUG: 394737

Only do it for the transactions we need.

PackageKit will update every resource separately after the initial fetch
and this would recompute the update size for each.
Now its done once per update, saving some freeze time.

Otherwise they show duplicated in ResourcesProxyModel

It makes the view look not uniform unnecessarily.

BUG: 394669

Antonio Rojas authored May 26, 2018 and Aleix Pol Gonzalez committed May 28, 2018

If PackageKit throws an error, abort the transaction instead of finishing it anyway (potentially breaking the user's installation).
This is far from ideal, but prevents Discover from performing destructive operations while the PackageKit issues are fixed

BUG: 394327
Differential Revision: https://phabricator.kde.org/D13119

Don't assume we're listing the technical resources

I haven't been able to reproduce the issue from the bug but this seems
to be the issue.

BUG: 390647

BUG: 394543

PackageKit dnf backend doesn't resolve the different packages in the
transaction as finished so they were not detected as changed.

BUG: 394388

BUG: 394270

When removing resources, remove its references as well.

BUG: 392971

BUG: 394048

Usually should be a remote URL anyway

BUG: 393987

BUG: 393909

BUG: 393910

Don't try to match when the URL isn't adequate.
Also check the state.

Won't get under the scroll bar, uses a BasicListItem rather than a raw
RowLayout.

Count packages, not resources.

BUG: 389108

BUG: 393614

GIT_SILENT

BUG: 393323