Backport CMS7-6987: Regression: Document type editor does not show moving a field to another column

I work with archetype 1.07.01, based on cms 7.8.1.
Go to the document type editor, create a new document type (based on the basedocument super type). Choose the 2 column layout. Create a new field, say of type String. Move that field to the right column using the triangle (>). Try to move it back to the left column with the <-triangle. This fails: the field remains in the right column.
Clicking "done" fixes this: the field is shown in the correct column now. There is no trace in the log.
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Simon -
I can reproduce this in current live GoGreen CMS (https://cms.demo.onehippo.com/) and latest archetype 1.07.01.

• log in to cms
• go to documents perspective
• go to configuration
• create new content type, choose 2 column layout
• add string field
• add date field
• click done
• click edit
• move date field to right column using arrow icon (nothing will happen in the UI)
• click done (date field will show in right column now)
• click edit
• move date field back (nothing will happen in UI)
• click done (date field will show in left column now)

In the local archetype installation I can see just the following error on the console:

INFO] [talledLocalContainer] 04.04.2013 10:46:52 WARN [org.hippoecm.frontend.editor.layout.ListItemLayoutContext.reparent():125] No plugin config found
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