overhauled registry

src/main/java/de/srsoftware/web4rail/tiles/Bridge.java

@@ -7,6 +7,7 @@ import java.util.Map;
 import org.json.JSONObject;
 
 import de.srsoftware.tools.Tag;
+import de.srsoftware.web4rail.BaseClass;
 import de.srsoftware.web4rail.Connector;
 import de.srsoftware.web4rail.Route;
 import de.srsoftware.web4rail.Window;
@@ -100,6 +101,12 @@ public abstract class Bridge extends Tile {
 		return t("Click other bridge to connect to!");
 	}
 	
+	@Override
+	protected void removeChild(BaseClass child) {
+		if (child == counterpart) counterpart = null;
+		plan.place(this);
+	}
+	
 	@Override
 	public Tag tag(Map<String, Object> replacements) throws IOException {
 		Tag tag = super.tag(replacements);