0.4.3 SpooOooky Bug Fixes

Fixes:

• Fix macOS not able to select the Starsector app
• Fix popups sometimes saying "INVALID MESSAGE WITH QUOTES"
• Fix RAR5 archives failing to unpack

Improvements:

• Refactored dialog/popup functions. They may look better on Windows now
• Add explicit "Install from Single" and "Install from Multiple" archive buttons
• Improve error messaging when a mod fails to install.
  • There is now feedback if a mod being installed has a malformed mod_info.json file or no mod could be found in a given archive
• Maybe make macOS binaries fully portable.
  • You should hopefully no longer need to install libarchive through brew to get the app to work