Replace Icon on the Activity Bar by an Octocat (or anything different to built-in Source Control)

[manuartero]

Searched for duplicated issues, didn't find any

Situation: Current Icon for the Activity Bar is extremely similar to already existing menu "Source Control" (check the image)

Request: Change the Activity Bar icon of this extension.
Suggestion: I'd go for an Octocat; Octocat === Github , besides the icon is already in the repo (https://github.com/microsoft/vscode-pull-request-github/blob/master/resources/icons/github_logo.png)

[KaiSforza]

I made it the svg logo they have in resources/icons/dark, it fits the monotone theme a bit better.