Performance Issue with Project View

[RoyAwesome]

Iterating through every file in the VPK takes a significant amount of time. We should either look into reducing this time or running the iteration/placing of tree nodes in a BackgroundWorker and not block the UI.

[RoyAwesome]

I looked into fixing this, it's a bit more involved

[SinZ163]

Doing it in the background would be a viable solution, and depending on how the rest of the Initial stuff works, could be done in parallel with parsing the kv files

[RoyAwesome]

After some debugging, the perf issue for this is not because it's looping through the VPK.