#1284 fix inbox pagination after loading all messages

[sosnovsky]

This PR fixes inbox pagination after loading all messages/threads.

close #1284

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Tests (delete all except exactly one):

• Difficult to test (explain why) - there is no easy way to calculate how many messages were loaded in appium, can be done in separate task if such test is needed.

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To be filled by reviewers

I have reviewed that this PR... (tick whichever items you personally focused on during this review):

• addresses the issue it closes (if any)
• code is readable and understandable
• is accompanied with tests, or tests are not needed
• is free of vulnerabilities
• is documented clearly and usefully, or doesn't need documentation

[tomholub]

@fcvakintos please test