Closing load project screen cancels loading of workspace

CURA-1263

cura/Settings/MachineManager.py

@@ -53,8 +53,6 @@ class MachineManager(QObject):
         ExtruderManager.getInstance().activeExtruderChanged.connect(self.activeStackChanged)
         self.activeStackChanged.connect(self.activeStackValueChanged)
 
-
-
         Preferences.getInstance().addPreference("cura/active_machine", "")
 
         self._global_event_keys = set()

plugins/3MFReader/WorkspaceDialog.py

@@ -175,8 +175,8 @@ class WorkspaceDialog(QObject):
     @pyqtSlot()
     ##  Used to notify the dialog so the lock can be released.
     def notifyClosed(self):
-        if self._result is None:
         self._result = {}
+        self._visible = False
         self._lock.release()
 
     def hide(self):