Bug in ies gui element

[joakim-hove]

Exception in thread ert_gui_simulation_thread:
Traceback (most recent call last):
  File "/usr/lib/python2.7/threading.py", line 801, in __bootstrap_inner
    self.run()
  File "/usr/local/lib/python2.7/dist-packages/ert_gui/simulation/run_dialog.py", line 122, in run
    self._run_model.startSimulations( arguments )
  File "/usr/local/lib/python2.7/dist-packages/ert_gui/simulation/models/base_run_model.py", line 61, in startSimulations
    self.runSimulations(arguments)
  File "/usr/local/lib/python2.7/dist-packages/ert_gui/simulation/models/iterated_ensemble_smoother.py", line 68, in runSimulations
    run_context = self.create_context( arguments , 0 )
  File "/usr/local/lib/python2.7/dist-packages/ert_gui/simulation/models/iterated_ensemble_smoother.py", line 128, in create_context
    run_context = ErtRunContext.ensemble_smoother( sim_fs, target_fs, mask, runpath_fmt, subst_list, itr)
TypeError: ensemble_smoother() takes exactly 8 arguments (7 given)

^CTraceback (most recent call last):
  File "/usr/local/lib/python2.7/dist-packages/ert_gui/simulation/run_dialog.py", line 142, in updateRunStatus
    def updateRunStatus(self):
KeyboardInterrupt