Fix Plate delete (Fix #11009, See #10776)

fc6b8340236c006c64043c22296268bddb11ea14 removed the
"+WS" suffix from Image, which broke plate delete.
Essentially, the Image subgraph was not being processed
but just the image table itself.
Merge pull request #1225 from joshmoore/11009-plate-delete

Fix Plate delete (Fix #11009, See #10776)