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.

tests/integration/test_layout_unchanged.gd

@@ -58,6 +58,11 @@ const RENAMED_SCENES: Dictionary = {
 	"Player": "PlayerRow",
 }
 
+## Nodes renamed inside a popup: old path from the main window, and new path.
+const RENAMED_PATHS: Dictionary = {
+	"SearchPopup/ScrollContainer/VBoxContainer": "SearchPopup/ScrollContainer/SearchResults",
+}
+
 ## How far a node may be from its old place, in pixels.
 const TOLERANCE: float = 0.5
 
@@ -96,7 +101,11 @@ static func new_path(old_path: String) -> String:
 		parts[i] = RENAMED_SCENES.get(parts[i], parts[i])
 	var first: String = parts[0]
 	parts[0] = MOVED.get(first, first)
-	return "/".join(parts)
+	var path: String = "/".join(parts)
+	for renamed: String in RENAMED_PATHS:
+		if path == renamed || path.begins_with(renamed + "/"):
+			return RENAMED_PATHS[renamed] + path.trim_prefix(renamed)
+	return path
 
 
 func _baseline() -> Dictionary: