[MA-19]: MM-61641: Ensure implicit list markup is avoided

[ayush-chauhan233]

Summary

• There is content that appears as a list but does not use list markup.
• Added ul and li tags to structure the list correctly.

Steps to reproduce

• Locate the White check mark, +1, Grinning, Add reaction, save message, Message actions, Reply and More buttons list by hovering a message element.
• Inspect it with Chrome DevTools.
• Note that it does not use ul, li and related elements.

Ticket Link

https://mattermost.atlassian.net/browse/MM-61641

Expected behaviour

The list should be structured with correct semantic tags.

Screenshots

before	after

Release Note

NONE