Fix double wizard on incompatible bundle, for real this time

src/slic3r/Utils/PresetUpdater.hpp

@@ -28,9 +28,17 @@ public:
 	// If version check is enabled, check if chaced online slic3r version is newer, notify if so.
 	void slic3r_update_notify();
 
+	enum UpdateResult {
+		R_NOOP,
+		R_INCOMPAT_EXIT,
+		R_INCOMPAT_CONFIGURED,
+		R_UPDATE_INSTALLED,
+		R_UPDATE_REJECT,
+	};
+
 	// If updating is enabled, check if updates are available in cache, if so, ask about installation.
 	// A false return value implies Slic3r should exit due to incompatibility of configuration.
-	bool config_update() const;
+	UpdateResult config_update() const;
 
 	// "Update" a list of bundles from resources (behaves like an online update).
 	void install_bundles_rsrc(std::vector<std::string> bundles, bool snapshot = true) const;