* refactor(contacts): refactor 5 contact models into one and filter in QML
Fixes#16549
Refactors the 5 types of contact models (all, mutuals, banned, received and sent) into only the `allContacts` and use an Adaptor on the QML side to filter into the needed models.
This cleans the Nim side a lot and makes applying updates to the contacts' model way simpler.
* chore(contacts): remove useless and duplicated contact properties
OptionalName and isSyncing were never used.
DefaultDisplayName was not really used and is actually a duplication of preferredDisplayName, so I replaced the limited usages of DefaultDisplayName by preferredDisplayName
* refactor(contacts): improve updates by not removing and re-adding
We used to update contact items by removing them from the models and re-adding them. This is highly inefficient.
Instead, the proper way is to update only the values that changed.
* user_model: onItemChanged signal removed
* user_model: sorting by online status no longer needed on nim side
* Chat/RootStore: contactsModel property removed
* ContactsStore encapsulation improved
* ContactsStore: contacts model adaptor moved outside store
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Co-authored-by: Michał Cieślak <michalcieslak@status.im>
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