[UX] gray text in the diff view can't be copied

[ameaninglessname]

the copy button doesn't work

[ameaninglessname]

I wonder the reason behind this design.

If it has to be unable to be copied, maybe the copy button should not be shown up?

[love-linger]

Because it is not Copy as Patch. I'll hide the Copy context menu when user only selected the hunk indicator line.