Fixed overflow on mobile screens for the slash commands

What does this MR do?

Fixes the overflow that's currently happens on mobile screens, (except on really large mobile screens)

Why was this MR needed?

To improve our UI polish on mobile screens

Screenshots (if relevant)

Before	After

Does this MR meet the acceptance criteria?

• Changelog entry added, if necessary
• Tests
  • All builds are passing
• Conform by the merge request performance guides
• Conform by the style guides
• Branch has no merge conflicts with master (if it does - rebase it please)
• Squashed related commits together

What are the relevant issue numbers?

closes #29013 (closed)