Made a new "src" folder that will contain the source code files, like all the GDScript and scene files. Please read this for more details: https://www.gdquest.com/docs/guidelines/best-practices/godot-gdscript/
It made no sense to keep scenes separate from their scripts. More file organizing will follow soon.
- If the palette has colors, automatically select the first one
- When adding a new color button, take the color currently selected on the picker instead of white
- Fixes issues with drag&dropping color buttons. The color that was dragged remains selected.
