Remove main app testmode flag

tests/tools.py

@@ -28,6 +28,8 @@ from pathlib import Path
 
 from PyQt6.QtWidgets import QDialog, QVBoxLayout, QWidget
 
+from novelwriter import logger
+
 XML_IGNORE = ("<novelWriterXML", "<project")
 ODT_IGNORE = ("<meta:generator", "<meta:creation-date", "<dc:date", "<meta:editing")
 NWD_IGNORE = ("%%~date:",)
@@ -155,6 +157,12 @@ def cleanProject(path: str | Path):
     return
 
 
+def clearLogHandlers():
+    """Clear all log handlers."""
+    for handler in logger.handlers:
+        logger.removeHandler(handler)
+
+
 def buildTestProject(obj: object, projPath: Path) -> None:
     """Build a standard test project in projPath using the project
     object as the parent.