Improve repository code search

As an user, I would like to be able to search a specific file in all repository branches using global repository search.

Steps to reproduce:
Open the repository in question
Use the magnifier at the top left of the screen
Search for the file

Currently behavior:
it only displays files within the default (usually master) branch.

Expected behavior:
The search to display files and directories/branches these files are located

As a workaround, we have to use the search feature located within Source tab and we have to manually search each branch which is a pain.