ERD dnd fix. ERD tooltip fix.

plugins/org.jkiss.dbeaver.erd/src/org/jkiss/dbeaver/ext/erd/editor/ERDEditorInput.java

@@ -46,7 +46,7 @@ public class ERDEditorInput extends ProjectFileEditorInput implements IPersistab
     @Override
     public String getToolTipText()
     {
-        return "ER Diagram";
+        return diagramName;
     }
 
     @Override

plugins/org.jkiss.dbeaver.erd/src/org/jkiss/dbeaver/ext/erd/navigator/DBNDiagram.java

@@ -35,7 +35,6 @@ import org.jkiss.dbeaver.ui.UIUtils;
 public class DBNDiagram extends DBNResource
 {
     private Image image;
-    private EntityDiagram diagram;
 
     public DBNDiagram(DBNNode parentNode, IResource resource, DBPResourceHandler handler) throws DBException, CoreException
     {
@@ -58,8 +57,4 @@ public class DBNDiagram extends DBNResource
         return image;
     }
 
-    public EntityDiagram getDiagram()
-    {
-        return diagram;
-    }
 }

plugins/org.jkiss.dbeaver.erd/src/org/jkiss/dbeaver/ext/erd/navigator/DBNDiagramFolder.java

@@ -70,17 +70,4 @@ public class DBNDiagramFolder extends DBNResource
         return otherNode instanceof DBNDiagram || super.supportsDrop(otherNode);
     }
 
-    @Override
-    public void dropNodes(Collection<DBNNode> nodes) throws DBException
-    {
-        for (DBNNode node : nodes) {
-            if (node instanceof DBNDiagram) {
-                ERDResourceHandler.createDiagram(
-                    ((DBNDiagram) node).getDiagram(),
-                    node.getNodeName(),
-                    (IFolder) getResource(),
-                    null);
-            }
-        }
-    }
 }