code: def add_field_with_label(self, key, label_description, field):
          
          self.inputs[key] = field
          label = Label(label_description)
          label.style['margin'] = '0px 5px'
          label.style['min-width'] = '30%'
          container = HBox()
          container.style.update({'justify-content':'space-between', 'overflow':'auto', 'padding':'3px'})
          container.append(label, key='lbl' + key)
          container.append(self.inputs[key], key=key)
          self.container.append(container, key=key)
docs: Adds a field to the dialog together with a descriptive label and a unique identifier.
  
          Note: You can access to the fields content calling the function GenericDialog.get_field(key).
  
          Args:
              key (str): The unique identifier for the field.
              label_description (str): The string content of the description label.
              field (Widget): The instance of the field Widget. It can be for example a TextInput or maybe
              a custom widget.