squash some weird editor errors with extending XRTools clases

@tool is definitely a wart in godot.

override.cfg

@@ -1,3 +1,3 @@
 [xr]
 
-openxr/enabled=true
+openxr/enabled=false

scenes/base_game_scene.gd

@@ -1,3 +1,6 @@
+# annoying you have to @tool to successfully extend the XR tool classes,
+# which pollutes the the methods with editor only checks, oh well.
+@tool
 extends XRToolsSceneBase
 
 
@@ -7,7 +10,8 @@ func scene_loaded(user_data = null):
 
 func _ready():
 	# for editor testing when scene is directly loaded
-	_reset_manipulators()
+	if !Engine.is_editor_hint():
+		_reset_manipulators()
 
 func _reset_manipulators():
 	# reset the manipulators (the loaded scene has them in the final position)

scenes/manipulator/manipulator.gd

@@ -1,23 +1,38 @@
 # a vector field manipulator that can be picked up and radius resized by the
 # holding controller's joystick.
 # needs a VisualAttractorSphere child node to work.
+@tool
 class_name Manipulator
 extends XRToolsPickable
 
 var held_controller: XRController3D = null
 
-@onready var attractor: GPUParticlesAttractorSphere3D = $VisualAttractorSphere
+var attractor: GPUParticlesAttractorSphere3D 
 
 const MIN_SCALE = 0.5
 const MAX_SCALE = 10
 const SCALE_SPEED = 1.0
 
+# Add support for is_xr_class on XRTools classes
+# I'm not sure why this is needed exactly, but you'll at least
+# get console errors wihtout it.
+func is_xr_class(name : String) -> bool:
+	return name == "XRToolsPickable"
+
 func _ready() -> void:
 	super()
 	picked_up.connect(_on_pickable_object_picked_up)
 	dropped.connect(_on_pickable_object_dropped)
 
+	if Engine.is_editor_hint():
+		return
+
+	attractor = $VisualAttractorSphere
+
 func _process(delta: float) -> void:
+	if Engine.is_editor_hint():
+		return
+
 	if held_controller:
 		var joystick_y = held_controller.get_vector2("primary").y
 		if abs(joystick_y) > 0.1:

scenes/manipulator/manipulatorsphere.tres

@@ -63,7 +63,6 @@ void fragment() {
 
 }
 "
-graph_offset = Vector2(-451.023, -134.578)
 nodes/fragment/0/position = Vector2(620, 180)
 nodes/fragment/2/node = SubResource("VisualShaderNodeInput_5b52k")
 nodes/fragment/2/position = Vector2(-940, 280)

scenes/valentine_scene/valentine_scene.tscn

@@ -151,7 +151,7 @@ top_radius = 0.3
 bottom_radius = 0.3
 height = 5.0
 
-[node name="TitleScene" type="Node3D"]
+[node name="ValentineScene" type="Node3D"]
 script = ExtResource("1_fbwwc")
 
 [node name="XROrigin3D" parent="." instance=ExtResource("2_i3vfe")]