Fix groups sort dropdown alignment

What does this MR do?

Changes the dropdown located on the explore groups page from left aligned to right aligned.

Are there points in the code the reviewer needs to double check?

Shouldn't be

Why was this MR needed?

Keeps the UI consistent for dropdowns as they are right aligned on other pages

What are the relevant issue numbers?

Closes #21296 (closed)

Screenshots (if relevant)

Before:

After:

Does this MR meet the acceptance criteria?

• CHANGELOG entry added
• Tests
  • All builds are passing
• Conform by the style guides
• Branch has no merge conflicts with master (if you do - rebase it please)
• Squashed related commits together