activate & expand sub-folders on startup

[p1x44r]

Hi,

It'd be great for my workflow (and hopefully that of others) if the workspace explorer TreeView was activated on startup as well as all of its sub-folders were shown expanded on view.

I'm not familiar with VS code extension development or JS really, but I quickly looked over the extension API and something like adding onStartupFinished activation event and TreeView.reveal() if text editor isn't active (i.e. launching in single file view mode) seems like it could work here.

Does that make sense as two on/off options for this very helpful extension?

Thank you.

[ddellarocca]

+1 on this one!