Topology checker plugin. Cannot remove rules

[qgib]

Author Name: Alexey T (@Xeenych)
Original Redmine Issue: 21535
Affected QGIS version: 3.6.0
Redmine category:c++_plugins/topology_checker

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I cannot remove rules from topology checker plugin.
This is core plugin.

Sometimes QGIS crashes after removeing rules and quitting QGIS.
If there is no crash, topology checker rules appear again after reloading the project.

see this:
https://yadi.sk/d/NerVtHXlFN6Ymw

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Related issue(s): #28706 (relates)
Redmine related issue(s): 20887

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[qgib]

Author Name: Giovanni Manghi (@gioman)

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• relates was configured as Topology Checker keep settings #28706

[qgib]

Author Name: Giovanni Manghi (@gioman)

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• resolution was changed from to duplicate
• status_id was changed from Open to Closed