Make the 'Clear all overrides' button only active when there are overrides

[rablador]

Currently, the button is always active. According to the specs, we should make sure it is not active if there are no overrides being enabled.

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This change is 

[linear]

IOS-547 Make the "Clear all overrides" button only active when there are overrides

[rablador]

Reviewable status: 0 of 3 files reviewed, 1 unresolved discussion

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ios/MullvadVPN/Coordinators/Settings/IPOverride/IPOverrideInteractor.swift line 90 at r1 (raw file):

    }

    private func resetToDefaultStatus(delay: Duration = .zero) {

Added semi-related improvement here as well. Currently there can be weird timings for the status messages depending on user behavior (and patience).

[buggmagnet]

Reviewed 2 of 3 files at r1, all commit messages.
Reviewable status: 2 of 3 files reviewed, 2 unresolved discussions (waiting on @rablador)

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ios/MullvadVPN/Coordinators/Settings/IPOverride/IPOverrideInteractor.swift line 94 at r1 (raw file):

        let statusWorkItem = DispatchWorkItem { [weak self] in
            guard let self else { return }

Calling cancel on dispatchWorkItems doesn't actually cancel the execution if the item has already scheduled.
We should check here as well that the item itself is not cancelled

guard let self, self.statusWorkItem?.isCancelled == false else { return }

[rablador]

Reviewable status: 2 of 3 files reviewed, 2 unresolved discussions (waiting on @buggmagnet)

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ios/MullvadVPN/Coordinators/Settings/IPOverride/IPOverrideInteractor.swift line 94 at r1 (raw file):

Previously, buggmagnet wrote…

Calling cancel on dispatchWorkItems doesn't actually cancel the execution if the item has already scheduled.
We should check here as well that the item itself is not cancelled

guard let self, self.statusWorkItem?.isCancelled == false else { return }

Aha! Didn't know that. My intention was to cancel it altogether.

[buggmagnet]

Reviewed 1 of 3 files at r1, 1 of 1 files at r2, all commit messages.
Reviewable status: all files reviewed, 1 unresolved discussion

[github-actions]

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