Fix branches page dropdown sort initial state

What does this MR do?

Add 'Name' as the initial state for the branches dropdown filter

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

Shouldn't be

Why was this MR needed?

Prevent dropdown from being rendered without an initial state

What are the relevant issue numbers?

Closes #20753 (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