get correct cwd when treeview is the previousActiveItem

[tom-power]

Identify the Bug

https://github.com/atom-community/terminal/issues/101

Description of the Change

• use selectedPath in getInitialCwd when getPath doesn't return anything, which is the case for tree view items

Verification Process

Added tests, used for a while

Release Notes

• path of terminal opened with atomic-terminal:open now matches the selected project

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[UziTech]

If you want to get the tests passing I can merge this but I don't know if it is worth it since Atom is sunsetting soon

[tom-power]

sorry, can't think of another way to change these, and yes sunset but it still works :)

[UziTech]

Thanks for fixing this. :100:

[tom-power]

awesome thank you :1st_place_medal: