state totals fixes

[dwsutherland]

These changes close #4157

Also fixes incorrect state totals (caused by only the deltas, and not the store totals, being collected).
Although I have noticed additional succeeded every now and then, which I will hunt down eventually but is only visible in TUI.

Requirements check-list

• I have read CONTRIBUTING.md and added my name as a Code Contributor.
• Contains logically grouped changes (else tidy your branch by rebase).
• Does not contain off-topic changes (use other PRs for other changes).
• Already covered by existing tests.
• Appropriate change log entry included.
• No change log entry required (why? e.g. invisible to users).
• No documentation update required.
• No dependency changes.

[hjoliver]

👍

[kinow]

Tested the UI, on master got the states with different values than the ones displayed in the tree view, and also some weird state for the toolbar.

With this PR, the toolbar behaves correctly, and the states in GScan and in the tree view are matching. Great job @dwsutherland !

[kinow]

Got the issue I had seen on master again after trying a little more. Everything else seems to work fine, and this issue appears to be related to how we update the UI state after executing a mutation. Leaving it as approved as the code looks OK and the UI is working OK (cannot tell anything is wrong with stateTotals).

Will leave it to @oliver-sanders to finish the review 👍

[oliver-sanders]

🍾