Don't require command for CUI init.

worldedit-bukkit/src/main/java/com/sk89q/worldedit/bukkit/CUIChannelListener.java

@@ -41,8 +41,9 @@ public class CUIChannelListener implements PluginMessageListener {
     public void onPluginMessageReceived(String channel, Player player, byte[] message) {
         LocalSession session = plugin.getSession(player);
         String text = new String(message, UTF_8_CHARSET);
-        session.handleCUIInitializationMessage(text);
-        session.describeCUI(plugin.wrapPlayer(player));
+        final BukkitPlayer actor = plugin.wrapPlayer(player);
+        session.handleCUIInitializationMessage(text, actor);
+        session.describeCUI(actor);
     }
 
 }

worldedit-core/src/main/java/com/sk89q/worldedit/LocalSession.java

@@ -782,9 +782,9 @@ public class LocalSession {
      *
      * @param text the message
      */
-    public void handleCUIInitializationMessage(String text) {
+    public void handleCUIInitializationMessage(String text, Actor actor) {
         checkNotNull(text);
-        if (this.failedCuiAttempts > 3) {
+        if (this.hasCUISupport || this.failedCuiAttempts > 3) {
             return;
         }
 
@@ -794,13 +794,18 @@ public class LocalSession {
                 this.failedCuiAttempts ++;
                 return;
             }
-            setCUISupport(true);
+
+            int version;
             try {
-                setCUIVersion(Integer.parseInt(split[1]));
+                version = Integer.parseInt(split[1]);
             } catch (NumberFormatException e) {
                 WorldEdit.logger.warn("Error while reading CUI init message: " + e.getMessage());
                 this.failedCuiAttempts ++;
+                return;
             }
+            setCUISupport(true);
+            setCUIVersion(version);
+            dispatchCUISelection(actor);
         }
     }
 

worldedit-forge/src/main/java/com/sk89q/worldedit/forge/net/handler/WECUIPacketHandler.java

@@ -20,6 +20,7 @@
 package com.sk89q.worldedit.forge.net.handler;
 
 import com.sk89q.worldedit.LocalSession;
+import com.sk89q.worldedit.forge.ForgePlayer;
 import com.sk89q.worldedit.forge.ForgeWorldEdit;
 import net.minecraft.client.Minecraft;
 import net.minecraft.entity.player.EntityPlayerMP;
@@ -62,8 +63,9 @@ public final class WECUIPacketHandler {
         }
 
         String text = event.getPayload().toString(UTF_8_CHARSET);
-        session.handleCUIInitializationMessage(text);
-        session.describeCUI(adaptPlayer(player));
+        final ForgePlayer actor = adaptPlayer(player);
+        session.handleCUIInitializationMessage(text, actor);
+        session.describeCUI(actor);
     }
     
     public static void callProcessPacket(ClientCustomPayloadEvent event) {

worldedit-sponge/src/main/java/com/sk89q/worldedit/sponge/CUIChannelHandler.java

@@ -57,8 +57,10 @@ public class CUIChannelHandler implements RawDataListener {
                 return;
             }
 
-            session.handleCUIInitializationMessage(new String(data.readBytes(data.available()), StandardCharsets.UTF_8));
-            session.describeCUI(SpongeWorldEdit.inst().wrapPlayer(player));
+            final SpongePlayer actor = SpongeWorldEdit.inst().wrapPlayer(player);
+            session.handleCUIInitializationMessage(new String(data.readBytes(data.available()), StandardCharsets.UTF_8),
+                    actor);
+            session.describeCUI(actor);
         }
     }
 }