Editor: export do not work correctlly

[LukeSkyKoder]

Hello,
The feature to export widget o widget for app template do not work correctly.
Only "widget for app template" works partially, but the editor crush:

There were an error during project load: Traceback (most recent call last):
  File "editor.py", line 1045, in reload_project
    widgetTree = self.project.load(
  File "editor.py", line 346, in load
    configuration.configDict = _module.configuration
AttributeError: module 'project' has no attribute 'configuration'

...and it is impossible to load that file.

[RobWPink]

same, whats worse is it also deletes all the work currently in the editor