Better clarity when comparing branches

What does this MR do and why?

Better clarity when comparing branches

UI improvements for compare branches page

Changelog: changed

Screenshots or screen recordings

Screenshots are required for UI changes, and strongly recommended for all other merge requests.

Before	After

How to set up and validate locally

1.Go to Code > Branches 2.Click on three dots in the right for one of the branches, and select "Compare branches" option in the dropdown 3.Observe the page: title, subtitle, breadcrumbs and button changes 4.Try to compare branches with different options, make sure it is still works as expected

MR acceptance checklist

This checklist encourages us to confirm any changes have been analyzed to reduce risks in quality, performance, reliability, security, and maintainability.

• I have evaluated the MR acceptance checklist for this MR.

Related to #377957 (closed)