* Added line in `UndoLastCommitAction` to get the previous commit msg and store in `IStorageService`.
* Added `UpdateCommitInputPrevCommitMsg` that checks for that key in storage, and use it then remove it if it exists.
  * This does not suffer from the previous bug that blanked out the commit msg if you unstage a file.
  * Added a clause if the undo last commit fails to remove the key from storage. This way, it doesn't stay in there and get used later (I was scratching my head when it showed up later).

* Removed all previous commit message code.
* Changed `getCommitInfo` call to return a string that is the template contents.
  * Removed from `IModel`, `IRawStatus`
* Still has issue of locating `~/some/path/with/tilde` in it.
  * path.resolve resolves to the repo's `.build` path and not the user folder.
  * I'm testing this on Windows, and I don't know the behavior on Linux.

fixes #8541

* Seems to be working with limited testing.
* I am using `IStorageService` with no explicit scope, and I am unsure of the implications of this.
* There might should be an option for this functionality.

fixes #6388

fixes #5974

fixes #4471

fixes #2126

fixes #1216

fixes #1279

# Conflicts:
#	src/vs/languages/html/common/htmlTags.ts

fixes #907
related to #150