Add icon to indicate files modified both locally and in remote

[Fr0sk]

Hello,

It would be great to have a visual indicator (e.g. an icon or badge) for files that have been modified locally and also have changes in the remote branch.

Visual Studio Code does this by adding an additional M with a down arrow, as can be seen here:

This helps avoid merge conflicts by making users aware of overlapping changes earlier, and it is specially usefull when working with binary files like Unreal Engine projects, which are not easy to merge.

Thanks in advance for considering this feature!