Fix jumping to bottom when loading new messages

[nuno-vieira]

🔗 Issue Links

Resolves https://github.com/GetStream/ios-issues-tracking/issues/682

🎯 Goal

Fix the message list jumping to the bottom when loading new messages.

Before, whenever the newest message inserted was from the current user, we would scroll to the bottom. This is incorrect, since when loading new messages, if the last message author, is the current user, it will scroll to it. Now, it will only scroll if there is one insertion, which is what happens when the current user creates a new message.

🧪 Manual Testing Notes

1. Jump to a mid-page
2. Load new pages (Scroll to the bottom)
3. When loading the newest page the newest message is by the current logged-in user
4. The message list should not scroll to the bottom automatically

Note: The difference is not very noticeable sometimes. This issue also fixes another case where sometimes if a channel was opened and then quickly scrolling to the top, would unwillingly scroll to the bottom.

☑️ Contributor Checklist

• I have signed the Stream CLA (required)
• This change follows zero ⚠️ policy (required)
• This change should be manually QAed
• Changelog is updated with client-facing changes
• New code is covered by unit tests
• Comparison screenshots added for visual changes
• Affected documentation updated (docusaurus, tutorial, CMS)

[sonarcloud]

Quality Gate passed

The SonarCloud Quality Gate passed, but some issues were introduced.

47 New issues
0 Security Hotspots
91.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarCloud