Initialize super class with parent if available

When initializing the Screensaver class we should initialize it with the
parent class because when the parent is deleted, so it the Screensaver.
Setting the parent/child relation also coordinates the children
according to the parent, handles geometry and unhandled mouse/keyboard
events that should propagate to the parent.

Author: HugoCLSC

BlocksScreen/screensaver.py

@@ -10,7 +10,10 @@ class ScreenSaver(QtCore.QObject):
     touch_blocked: bool = False
 
     def __init__(self, parent) -> None:
-        super().__init__()
+        if parent:
+            super().__init__(parent)
+        else:
+            super().__init__()
 
         self.screensaver_config = parent.config.get_section(
             "screensaver", fallback=None