TCI - Fix enableWhen to check for type for canDelete

Change-Id: Iebb0d8fe668841e3577ae068530912d9368d4263
Signed-off-by: Eugen Neufeld <eneufeld@eclipsesource.com>
diff --git a/bundles/org.eclipse.emf.ecp.ui.e3/plugin.xml b/bundles/org.eclipse.emf.ecp.ui.e3/plugin.xml
index 7113518..c55ccc8 100644
--- a/bundles/org.eclipse.emf.ecp.ui.e3/plugin.xml
+++ b/bundles/org.eclipse.emf.ecp.ui.e3/plugin.xml
@@ -491,6 +491,9 @@
                <iterate

                      ifEmpty="false"

                      operator="or">

+                  <instanceof

+                        value="org.eclipse.emf.ecp.core.util.ECPContainer">

+                  </instanceof>

                   <test

                         property="org.eclipse.emf.ecp.core.container.canDelete"

                         value="true">