Reach nodes by unique name instead of long paths

Nodes a script uses through a path of several nodes are marked unique in their
scene and found with %Name. The search list is renamed SearchResults, and the
player row's nodes get their real types.

QRPopup.tscn

@@ -22,6 +22,7 @@ offset_right = 450.0
 offset_bottom = 520.0
 
 [node name="QRCodeRect" type="TextureRect" parent="QRPanel" unique_id=1054378438]
+unique_name_in_owner = true
 layout_mode = 0
 offset_left = 20.0
 offset_top = 20.0