[BLUEJ-1367] Menus do not respond to clicks or do not open

Immediately after opening BlueJ, the top row menus (which by the way are missing a keyboard shortcut to access) do not respond to mouse clicks.

After double-clicking on a class in a project to open it, and then close it, the menus start working.

debug-log doesn't seem to show anything useful

BlueJ run started: Mon Nov 01 08:57:54 GMT 2021 BlueJ version 5.0.2 Java version 11.0.10 JavaFX version 11.0.2+1 Virtual machine: OpenJDK 64-Bit Server VM 11.0.10+9 (AdoptOpenJDK) Running on: Windows 10 10.0 (amd64) Java Home: C:\Program Files\BlueJ\jdk

Opening project: C:\OULocal\M250Git\m250\Rewrite\Lights 1635757076736: Listening for JDWP connection on address: javadebug Connected to debug VM via dt_shmem transport... Communication with debug VM fully established.

Although some earlier messages say, e.g.

"Oct 21, 2019 9:51:42 AM javafx.scene.CssStyleHelper calculateValue WARNING: Could not resolve '-fx-text-background-color' while resolving lookups for '-fx-text-fill' from rule '*.label' in stylesheet jar:file:/C:/Program%20Files%20(x86)/BlueJ/jdk/jre/lib/ext/jfxrt.jar!/com/sun/javafx/scene/control/skin/modena/modena.bss"

Issue metadata

Issue type: Bug
Priority: High