add unity registry settings window

[unitycoder]

window where you can toggle unity registry settings on/off (for example DPI setting, as it requires restarting unity if change it in editor)

• [ ] button in settings, for "unity registry settings" or so
• [ ] opens new window, which list of settings in vertical stackpanel
• [ ] DPI setting (with dropdown menu for scale sizes, like editor)
• [ ] Other settings?