Add way to copy commit sha from Blame view
I am in the Blame view, and I have tracked down a particular commit. However, there seems to be no way to copy its sha so I can reference it later. I see it in the sidepanel next to the commit, and it underlines when I hover over, so I would have expected to be able to click on it to copy to keyboard, or to be able to right-click so I can copy it.
This would greatly help me in navigating and referring back to old commits