After pressing Right to expand a directory, pressing Down takes you back to the top of the list

[Dwedit]

First of all, nice program! But here's an issue with the user interface.

If you press Right on the keyboard to expand a directory, then press Down, the cursor is moved to the top of the list, rather than the first item of the directory you just expanded.

[trigger-segfault]

There's actually quite a few issues right now that need to be addressed. Deleting files and performing certain operations during scan is still pretty flaky. That's what I get for my first go at implementing MVVM and extreme memory + speed optimization. Thank you for the PR, lemme check it out.

[trigger-segfault]

I've merged the PR, issue should be resolved now.