bug #6545: [MASTER] Eclipse 4 bugs
Preference pages are shown in editor parts
Sometimes preference pages are drawn into open parts of the editor.
One way to reproduce
1. Open a taxon name editor
1. Open the preferences and close them
1. Open another taxon
1. Click on the name editor of the first taxon
When closing an re-opening the taxon everything's fine.
This is possibly connected to using the external preference migration library from opcoach (#7006)