GUI: improved main and battlefield menus (related to #11533):

- main menu: better naming for deck editor;
- battlefield menu: added deck view for computer players, better naming;
- network: improved experimental connection;

Mage.Common/src/main/java/mage/remote/interfaces/GamePlay.java

@@ -54,9 +54,9 @@ public interface GamePlay {
      *
      * @param passPriorityAction
      * @param gameId
-     * @param Data
+     * @param data
      * @return
      */
-    boolean sendPlayerAction(PlayerAction passPriorityAction, UUID gameId, Object Data);
+    boolean sendPlayerAction(PlayerAction passPriorityAction, UUID gameId, Object data);
 
 }