* update vscode git api
* force-push for non-HEAD commit & commit widget

- Showing and refreshing the _Commits_ view
  - Expanding commits, branches, and worktrees

Removes unused key property

Remembers comparison file filtering on filter/refresh
Disallows comparisons with the working tree (e.g. right side)
Disables swap when comparing from the working tree

Adds new in-memory node state storage to views

Avoids the silly looping that we used to need to do before the new apis