Ensure proper working directory for fixup⇥ snippet

This is another command affected by the recent change of default working directory.
Revert "Fixed "Visualize History with SourceTree" by using git.path() instead of git.root()."

This reverts commit 0ebca79fb73a67329d4f5f3ae63003e8d677be93.
Revert "Added "Visualize History with SourceTree"."

This reverts commit 15c1633100db047b496044cc5744558e64a24ebc.
Merge branch 'master' of https://github.com/textmate/git.tmbundle