'When the user selects a plugin, it will change the text
displeyed on the entries to their corresponding values'

def on_plugin_selection(self, selection):

    try:
        (model, treeiter) = selection.get_selected()
        self.name_of_selected = model[treeiter][0]
        description = model[treeiter][1]
        self.descriptionEntry.set_label(description)
    except TypeError:
        pass
