Show Config Folder

This MR finishes the Show Config button in the About Modal.

The old version was opening the config file, which can create some undesired behavior (on my computer it was opening After Effects, since it was the default application set to open json files). Instead, we'll open the config folder instead, where the config.json file is clearly listed at the top of the file explorer.

It also adds some padding to give the buttons some line spacing.