[BUG]: Allow the filter dialogue to respect 'don't update while focused'

[Mitecon]

Brief description of the issue

While the filter dialogue is open, it does not respect the 'Only auto-fetch articles if application is unfocused' setting.

Sometimes when doing some filtering operation, there will be an update in the background and the program appears to hang for a while if both are happening at once.

How to reproduce the bug?

1. Hold the filter dialogue open, resized to be able to see the progress bar at the bottom right.
2. Wait until there is a feeds update
3. Click the 'Process checked feeds' button for a filter while the update is in progress
4. Observe the apparent hang for a noticeable amount of time

What was the expected result?

Either one of these would be fine:

• Filters can be tested or processed without issue regardless of the updating state.
• While the filter dialogue is open, to disallow updating feeds.

Probably: Allow the filter dialogue to respect Settings->Feeds & articles->Feed fetching->'Only auto-fetch articles if application is unfocused' since the filter dialogue is technically part of the application.

What actually happened?

For now, I use KDE's built in window rules to force the filter dialogue into a position where I can see the progress bar at the bottom right of the screen so I know whether or not it is safe to apply a filter or to wait until it's finished.

There is no way around this other than to be careful.

I've filed this as a bug report, rather than a feature request, because I could imagine a scenario where the two things at once do not play nice together. I haven't experienced a crash because of this.

Debug log

Not really relevant here.

Operating system and version

• OS: Manjaro
• RSS Guard version: I imagine every version has the potential for this issue