Metadata editor crashes after a few clicks

[matthias-ronge]

• Move the mouse over a page

• Right click to open the mouse menu

• Click the only option. The dialog appears.

• Click "Cancel".
• Move the mouse over a page

• Right click to open the mouse menu. The menu is still very shortly visible ...

• ... then the editor crashes.

Stacktrace:

java.lang.IllegalStateException
    at org.kitodo.production.forms.dataeditor.AddDocStrucTypeDialog.getStructuralElementView(AddDocStrucTypeDialog.java:598)
    at org.kitodo.production.forms.dataeditor.AddDocStrucTypeDialog.prepareSelectAddableMetadataTypesItems(AddDocStrucTypeDialog.java:518)
    at org.kitodo.production.forms.dataeditor.MetadataPanel.showPageInLogical(MetadataPanel.java:145)
    at org.kitodo.production.forms.dataeditor.GalleryPanel.selectMedia(GalleryPanel.java:735)
    at org.kitodo.production.forms.dataeditor.GalleryPanel.select(GalleryPanel.java:775)

[solth]

@matthias-ronge could you test whether the problems still persists after https://github.com/kitodo/kitodo-production/pull/3927 has been merged?

[matthias-ronge]

The problem can still be reproduced with current master at 8b5e52770c01c821035a82dfd02a6a5f05bc9e31.