Bug - Configuration: If there is only a `config.tsx` present, config doesn't load until saved once

It's common to save out the dotfiles of your config - like stashing a config.tsx somewhere, and sharing it between machines.

Repro:

• Customize your configuration by saving a value in your config.tsx
• Delete the config.js that is (generated) next to your config.tsx
• Reload Oni

Expected: Configuration changes should still be present Actual: Configuration changes are not present

Oni actually uses a config.js, and when you save the config.tsx, it automatically generates the corresponding config.js. It doesn't make sense to check-in both of these, but if you only bring over a config.tsx, the config.js won't be generated until you've saved your config.tsx once.

We should detect this case (where there is a config.tsx, but no corresponding config.js) and attempt to transpile it on startup.