Advanced Options GUI

[LeafHacker]

Is your feature request related to a problem? Please describe. The installer has several settings that can only be accessed via the CLI.

Describe the solution you'd like A separate page/popup/form/dialog/gui which contains all settings and allows them to be configured.

Additional context The initial motivation for this was the removal of the Minecraft Launcher Directory setting from the GUI. However with that setting now shown again when relevant, an advanced options gui would still be useful for full access to settings while running the installer.