The "Pretty UI" Update!

Changes of note

• New shiny Fluent UI!
• Dark theme!
• More room for expansion!
• Really messy code!
• New customisable tray icon!
• New settings page and settings file (settings.json)!

Bug fixes

• Copying app properties works properly again
• More alignment tweaks
• Probably squished some other bugs

Issues

• Nothing new of note, but there probably are some more bugs, sowwy :c