fix inluence_token setting auto cleanup and fix is_dirty

src/warchron/controller/campaign_controller.py

@@ -177,9 +177,10 @@ class CampaignController:
         except DomainError as e:
             QMessageBox.warning(
                 self.app.view,
-                "Deletion forbidden",
+                "Closure forbidden",
                 str(e),
             )
+            return
         self.app.is_dirty = True
         self.app.navigation.refresh(RefreshScope.CURRENT_SELECTION_DETAILS)
         self.app.navigation.refresh_and_select(