Option to hide diff control buttons

[maan2003]

Check for existing issues

• Completed

Describe the feature

I don't use mouse for editing, so this is just wasted lines (probably for most vim mode users). So options to hide this would be nice.

This was added in #18313

cc @maxdeviant

If applicable, add mockups / screenshots to help present your vision of the feature

No response

[iamnbutler]

I don't think there is a major design consideration here – I'm pretty neutral on allowing hiding this header, but from a design perspective it is all or nothing. Either it is there or it isn't.