Refactor chats tab now scrolls to top, when tab pressed during opened (#1513)

[Ilgz]

Resolves #1513

Synopsis

Scrolling behavior for the Chats tab when re-selecting the tab button.

Solution

When the user taps the Chats tab button in the CustomNavigationBar, the Chats list should automatically scroll to the top.

Checklist

• Created PR:
  • In draft mode
  • Name contains issue reference
  • Has type and k:: labels applied
• Before review:
  • Documentation is updated (if required)
  • Tests are updated (if required)
  • Changes conform code style
  • CHANGELOG entry is added (if required)
  • FCM (final commit message) is posted or updated
  • Draft mode is removed
• Review is completed and changes are approved
  • FCM (final commit message) is approved
• Before merge:
  • Milestone is set
  • PR's name and description are correct and up-to-date
  • All temporary labels are removed

[Ilgz]

FCM

Refactor chats tab now scrolls to top, when tab pressed during opened  state (#1520, #1513)

[SleepySquash]

@Ilgz, don't ignore Contribution Guide, please. And also it seems that you're in a hurry, since there's a lot of things I've noticed that can be resolved just by doing a self-review or self-checkup before sending task for a review. Please, you shouldn't hurry. Let's aim for quality. If there's anything you aren't sure about, then take an hour or two to reflect about it!