Fix torrent content checkbox state under certain conditions

[thalieht]

Set folder as partially checked when it has at least one partially checked child and none unchecked.

Closes #22189.

[glassez]

Set folder as partially checked when it has at least one partially checked child and none unchecked.

Should't it behave as the following?

1. Folder is checked if all its direct children are checked.
2. Folder is unchecked if all its direct children are unchecked.
3. Folder is partially checked otherwise.

[thalieht]

Set folder as partially checked when it has at least one partially checked child and none unchecked.

Should't it behave as the following?

It does... doesn't it? Or did i phrase it too weirdly? I tried to describe the conditions for #22189.

[glassez]

Set folder as partially checked when it has at least one partially checked child and none unchecked.

Should't it behave as the following?

It does... doesn't it? Or did i phrase it too weirdly? I tried to describe the conditions for #22189.

I didn't have time to look at anything except the PR description. I expected it to describe how qBittorrent behaves after PR is merged. The described behavior looks incorrect, so I have provided my suggestion for correct behavior.

[glassez]

Code changes LGTM. Didn't test.

[glassez]

Set folder as partially checked when it has at least one partially checked child and none unchecked.

Should't it behave as the following?

It does... doesn't it?

Judging by code changes it does.

[glassez]

@thalieht
Thank you!

[Chocobo1]

Is v5.0.x affected? If yes, then it should be backported.

[thalieht]

Is v5.0.x affected?

Yes.

[Chocobo1]

@thalieht
Do you mind submit a backport PR?

[glassez]

@thalieht
Do you mind submit a backport PR?

I would stick to the previous arrangement to do backports via single cumulative "backport PR" (whenever possible).
Or is it irrelevant now for some reason?
@sledgehammer999?

[glassez]

Backported by #22207.