Getset window

[CJCrafter]

Adds some quality-of-life changes and uses a new UI instead of handling everything automatically.

• Adds deleter support
• Creates a window when requesting getter/setter generation
  • You can select which instance variables you want properties for
  • You can select getters/setters/deleters for all variables
  • private properties (__) are checked by default
• You can now change the format of the getters and setters by editing the live code templates