Added edit palette menu and custom file saving

Scripts/PaletteButton.gd

@@ -0,0 +1,39 @@
+extends Button
+
+# Declare member variables here. Examples:
+# var a = 2
+# var b = "text"
+
+signal on_drop_data
+
+export var index := 0;
+export var color : Color = Color.white
+export var draggable := false
+
+var drag_preview_texture = preload("res://Assets/Graphics/Palette/swatch_drag_preview.png")
+
+# Called when the node enters the scene tree for the first time.
+func _ready():
+	pass # Replace with function body.
+	
+func get_drag_data(position):
+	var data = null;
+	if(draggable):
+		#print(String(get_instance_id()) + ": Drag Start");
+		data = {source_index = index};
+		var drag_icon = TextureRect.new();
+		drag_icon.texture = drag_preview_texture;
+		drag_icon.modulate = color
+		set_drag_preview(drag_icon);
+	return data;
+
+func can_drop_data(position, data):
+	return true;
+
+func drop_data(position, data):
+	emit_signal("on_drop_data", data.source_index, index);
+	pass;
+
+# Called every frame. 'delta' is the elapsed time since the previous frame.
+#func _process(delta):
+#	pass