Fixed Jump Tracker jumps when jumping from a file that auto closes

[shawnaxsom]

What this PR does / why we need it:

I implemented the new Jump Tracker that handles <C-o> behavior. @Chillee and I noticed a few issues when trying to jump from or to files that are auto closed.

One use case, if you close all editors, then open temporary editor, then jump to definition to open another editor (auto-closing the previous editor), <C-o> often doesn't work. vscode ends up sending two separate vscode.window.onDidChangeActiveTextEditor events, once for closing one editor, once for opening the new editor, where as we were expecting just one event.

Another similar use case from @Chillee has the same cause:

If you create a new tab that isn't saved, and you just switch back to the original tab
`ctrl-o` gets you stuck switching between the 2 tabs

So you're in file A
you create a new unsaved file B
so now you're in B
you switch back to file A through a mouse click
`ctrl o` then brings you back to file B
and repeated `ctrl o` cycles between file B -> A -> B ....

Which issue(s) this PR fixes

fixes #3039

[Chillee]

LGTM!