[BUG] IMessageAttachment is not collapsed

[juzser]

Description:

I'm developing app on version 3.1.0-rc.1, and see the IMessageAttachment is not collapsed even I set the collapsed: true.
It's still working when I used version 3.0.x.

Steps to reproduce:

1. IMessageAttachment
2. Set collapsed:true
3. The attachment is not collapsed on 3.1.0

Expected behavior:

The message's attachment should be collapsed, both as default and when refresh the platform.

Actual behavior:

It works well (collapsed) on 3.0.x but it's expanded on 3.1.0.

Server Setup Information:

• Version of Rocket.Chat Server: 3.1.0-rc.1
• Operating System: MacOS
• Deployment Method: Development, git
• Number of Running Instances: 1
• NodeJS Version: 10.16
• Meteor: 1.10

Client Setup Information

• Desktop App or Browser Version: Chrome 80
• Operating System: MacOS

[ggazzo]

closed by: #16994