Rework Monitoring, Account, Log

• Rework all monitoring
• Rework account, now have author (history of account has author but in UUID form)
• Rework logs to fetch histories from cases and accounts
• Fix save and delete method overriding
• Now uses ModelViewSet with built-in filters

Notes

• Careful when deleting or saving instance, make sure you pass (author=request.user.account), just like in the serializers and the perform_destroy
• The author assignment needs more checking (see /commons/models/save)
• String representations, properties, and model managers need testing (current coverage is 99%)
• Needs heavy refactoring