According to [this answer][0] here and [this blogpost][1], if the `NSMainNibFile` is not specified in the `*.plist` file, then `NSApplicationMain` will look through the bundle to get the first nib file it finds. I like the explicitness of naming it and it probably also saves a miniscule amount of CPU/IO when we can skip finding the file. [0]: https://stackoverflow.com/questions/42886400/how-does-nsapplicationmain-find-the-main-nib-file [1]: https://jameshfisher.com/2017/03/20/how-is-mainmenu-xib-loaded/
We previously used the "screen.viewportIsBottom" check but this is always true since awhile back since we copy only the viewport now. A cleaner check really is that we only track the cursor cell if we're even drawing the cursor.
