1. Removes pre-load singleton scripts from the project settings
2. Sets black background and ui_highContrast_but_theme.tres for buttons
3. Adds focus grab script for temp backgrounds for tab/enter control
The following changes done here:
1. Stripped down to the main menu, and that pushed as erpg\Godot\MainMenu\GodotUserInterface_Doug bcirpg_mainMenu_[date]
2. Relocated all other project work to: erpg\Godot\Experiments\Doug\
