WindowsTileVertical: suppress in the legacy UI

Really, this command should only be shown in the SwingMDIUI,
but for now, let's at least not show it in the LegacyUI.

And really really, there should be a Tile command that doesn't
care about MDI vs. SDI, etc. Ideally would work for _all_ UIs
(except maybe LegacyUI, since it has its own Tile command)...

Author: ctrueden

src/main/java/org/scijava/ui/swing/mdi/WindowsTileVertical.java

@@ -31,6 +31,7 @@
 package org.scijava.ui.swing.mdi;
 
 import org.scijava.command.Command;
+import org.scijava.plugin.Attr;
 import org.scijava.plugin.Parameter;
 import org.scijava.plugin.Plugin;
 import org.scijava.ui.Arrangeable.Arrangement;
@@ -42,7 +43,8 @@
  * 
  * @author Grant Harris
  */
-@Plugin(type = Command.class, menuPath = "Window>Tile Vertical")
+@Plugin(type = Command.class, menuPath = "Window>Tile Vertical",
+	attrs = { @Attr(name = "no-legacy") })
 public class WindowsTileVertical implements Command {
 
 	@Parameter