Ability to select the main branch on Branches page

Problem Definition

It's hard to select any branch for comparison.
Users would need to navigate to Repository Settings to change the Main Branch in order to view the commits comparison (Behind and Ahead) between the main branch other branches.

Suggested Solution

It will best to have combo-box to select the main reference branch on Branches page.
This will allow users to compare the branches without navigating to Repository Settings to change the Main Branch.