Inbox unread filter fixes - Real-time items update #2317

[andreymikhadyuk]

• PR title equals to the ticket name
• I added the ticket to the Development section of this PR.

What was changed?

• added logic for fetching of new unread inbox items. The logic is based on the user's inbox counter. We fetch all new items using inbox endpoint with unread flag and stop fetching when last lastDocTimestamp is older than current firstDocTimestamp

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[andreymikhadyuk]

@elatif2020 If it works fine for we can merge it, but after Daniel's change to inbox collection I will change the logic anyway.

[elatif2020]

@elatif2020 If it works fine for we can merge it, but after Daniel's change to inbox collection I will change the logic anyway.

@andreymikhadyuk
Okay as you prefer