We need some way to specify versioncontrolservice context actionsets.
I want the same shortcut to do a "svn commit" when I am using svn and a "git commit" when i am using git.
Same goes for blame.
But for SVN, I want to have "update" bound to the same shortcut as git's "pull --rebase".
And for "checkout", the two commands are really different between and git, so it might not make sense to associate them to each other.
So I guess we need a flexible way of defining 'abstract' common actionsets in the base VersionControlService, and then overriding the list in the derived classes.