bug when scan channels for 5083.sdr

Got error when scanning for channels in Channel Preferences Dialog. Experiment 5083

Traceback (most recent call last):
  File "/Users/ldam/Documents/GIT/sohview/sohstationviewer1/sohstationviewer/view/channel_prefer_dialog.py", line 485, in <lambda>
    lambda: self.change_station(is_multiplex))
  File "/Users/ldam/Documents/GIT/sohview/sohstationviewer1/sohstationviewer/view/channel_prefer_dialog.py", line 497, in change_station
    sel_sta_id = [
  File "/Users/ldam/Documents/GIT/sohview/sohstationviewer1/sohstationviewer/view/channel_prefer_dialog.py", line 499, in <listcomp>
    if self.data_set_key_radio_button_dict[sta_id].isChecked()][0]
KeyError: 'ICEZ'

The error happens because the first radio button is checked that calls change_station when data_set_key_radio_button_dict isn't completed.