Improved stability and other related fixes:

* server: added limit to max chat message (related to #11285);
* gui: fixed possible error after auto-submit deck;
* gui: fixed possible error after end game dialog;
* refactor: other code improves;

Mage.Common/src/main/java/mage/remote/Connection.java

@@ -261,6 +261,7 @@ public class Connection {
         return userData;
     }
 
+    @Deprecated // TODO: server side cards do not supports now, so remove outdated code (db sync with server)
     public boolean isForceDBComparison() {
         return forceDBComparison;
     }