IDE fails to start: 'Exception in thread "AWT-EventQueue-0" java.lang.NullPointerException'

On raspberry pi5 bookworm

````
Exception in thread "AWT-EventQueue-0" java.lang.NullPointerException
at cc.arduino.view.NotificationPopup.updateLocation(NotificationPopup.java:244)
at cc.arduino.view.NotificationPopup.(NotificationPopup.java:222)
at cc.arduino.view.NotificationPopup.(NotificationPopup.java:72)
at cc.arduino.contributions.ContributionsSelfCheck.lambda$run$0(ContributionsSelfCheck.java:133)
at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:311)
at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:758)
at java.awt.EventQueue.access$500(EventQueue.java:97)
at java.awt.EventQueue$3.run(EventQueue.java:709)
at java.awt.EventQueue$3.run(EventQueue.java:703)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:74)
at java.awt.EventQueue.dispatchEvent(EventQueue.java:728)
at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:205)
at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:116)
at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:105)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:101)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:93)
at java.awt.EventDispatchThread.run(EventDispatchThread.java:82)
````

````
user@lysmarine:~ $ arduino --version
Picked up JAVA_TOOL_OPTIONS:
Loading configuration...
Initialising packages...
Preparing boards...
Arduino: 1.8.19

````

Thanks

Reproduce the startup failure on Raspberry Pi 5 with Bookworm, then inspect NotificationPopup.java at lines 222 and 244 and the caller in ContributionsSelfCheck.java at line 133. Done means the Arduino IDE starts without the reported NullPointerException.

Written by the indexing model from the issue text.