fix select round after closing

src/warchron/view/view.py

@@ -238,6 +238,10 @@ class View(QtWidgets.QMainWindow, Ui_MainWindow):
 
     def display_wars_tree(self, wars: List[WarDTO]) -> None:
         tree = self.warsTree
+        try:
+            tree.currentItemChanged.disconnect()
+        except TypeError:
+            pass
         tree.clear()
         tree.setColumnCount(1)
         tree.setHeaderLabels(["Wars"])