Open the diffed file from the diff tab context menu and/or toolbar

[krassowski]

Is your feature request related to a problem? Please describe.

I would like to be able to go to the file I am diffing from the diff easily. It is usually open in a tab, but I have many tabs open and sometimes getting lost.

Describe the solution you'd like

I would like to have a button "Open the diffed file" (which would usually just bring it up to focus rather than open) on the toolbar and/or similar option in the context menu when clicking on the diff tab:

Additional context

• Python package version: 0.30.1
• Extension version: 0.30.1