Fix: The pointer don't scrolls automatically to the new line when Shift+Enter is pressed

Description:

The pointer don't scrolls automatically to the new line when Shift+Enter is pressed even though the pointer is in new line.
This happens only when the Max Message box height is reached. Else it works fine.

Steps to reproduce:

Try Writing multiline message on Rocket Chat web view.
As shown in the video below.

Actual behavior:

https://github.com/user-attachments/assets/eb794ce6-6a90-42d9-8c7f-1e98191c0083

Expected behavior:

https://github.com/user-attachments/assets/2171ecd1-5124-4a4c-8c8f-96477e897422

--The code is complete, will add a PR in a couple of minutes.

Server Setup Information:

• Version of Rocket.Chat Server: 7.5.0-develop
• License Type:
• Number of Users:
• Operating System: Ubuntu 24.04
• Deployment Method:
• Number of Running Instances:
• DB Replicaset Oplog:
• NodeJS Version: \v22.13.1
• MongoDB Version:

Client Setup Information

• Desktop App or Browser Version: Brave
• Operating System: Ubuntu 24.04

Additional context

Relevant logs:

Start by reproducing the issue in the Rocket.Chat web view: enter a multiline message, press Shift+Enter after the maximum message-box height is reached, and compare the pointer position with the attached videos. Done means the pointer automatically scrolls to the new line in this case, while existing behavior remains unchanged when the height limit is not reached.