Focus issues with ContextMenu in Chrome/Edge browser

[gadams301]

I previously reported this in the forum : https://www.eclipse.org/forums/index.php/t/1112650/

Now we have prepared a small sample application to demonstrate the issue.
ContextMenudDemo.zip

The idea is that you type some text into the text field, click the right mouse button, which will show a context menu and select the "Select All" option there.
In Chrome and Edge, the selection is applied, but at the same time the text field looses the input focus (unnoticed by the Java servlet). Therefore, the selection is no longer visible. Only by moving the focus back into the field (with anything but the mouse) the fully applied selection can be seen.

In Firefox it works fine.

I hope you can compile the example code.
At this time we haven't found a way to work around this issue. Trying to set or force the focus back to the text widget after applying the selection, does not work. Probably, because neither the Java servlet nor (maybe) the Javascript framework notices this unwanted focus change.

BR
Gunnar Adams