Follow the GDScript style guide in every script

- Types on every parameter, return value and variable, and snake_case names
  (the player name limit is the constant MAX_NAME_LENGTH).
- Spelling fixes: *_triggered, character_selected, separator, caught_errors.
  The server's catched_errors key stays as the server sends it.
- Signals are connected with signal.connect() instead of by name.
- Code is ordered signals, constants, exported vars, vars, @onready vars,
  functions, with @onready on one line and two blank lines between functions.
- Every script starts with a ## description. Template comments, old LOC notes
  and commented-out code are gone, apart from the local play code.
- Lines are at most 100 characters, apart from the local play path.
- The screenshot tour turns off the blinking text cursor so pictures match.

tests/integration/test_layout_unchanged.gd

@@ -58,9 +58,14 @@ const RENAMED_SCENES: Dictionary = {
 	"Player": "PlayerRow",
 }
 
-## Nodes renamed inside a popup: old path from the main window, and new path.
+const SYNC_COLUMNS: String = "SyncPopup/SyncPanel/ScrollContainer/SyncVBoxContainer"
+
+## Nodes renamed inside a popup: the path after the moves above, and the new path.
 const RENAMED_PATHS: Dictionary = {
 	"SearchPopup/ScrollContainer/VBoxContainer": "SearchPopup/ScrollContainer/SearchResults",
+	SYNC_COLUMNS + "/CatchedErrorsVBox": SYNC_COLUMNS + "/CaughtErrorsVBox",
+	SYNC_COLUMNS + "/CaughtErrorsVBox/CatchedErrorsLabel":
+			SYNC_COLUMNS + "/CaughtErrorsVBox/CaughtErrorsLabel",
 }
 
 ## How far a node may be from its old place, in pixels.
@@ -102,9 +107,10 @@ static func new_path(old_path: String) -> String:
 	var first: String = parts[0]
 	parts[0] = MOVED.get(first, first)
 	var path: String = "/".join(parts)
+	# In order, so a node inside a renamed node is found after its parent's rename
 	for renamed: String in RENAMED_PATHS:
 		if path == renamed || path.begins_with(renamed + "/"):
-			return RENAMED_PATHS[renamed] + path.trim_prefix(renamed)
+			path = RENAMED_PATHS[renamed] + path.trim_prefix(renamed)
 	return path