'Return list of component names in a tab in a category.
Arguments:
category_type (str): category type
tab_index (int): tab index in a category
Returns:
list'

def get_category_tab_components(self, category_type, tab_index):

    css = '#tab{tab_index}    button[data-category={category_type}]    span'.format(tab_index=tab_index, category_type=category_type)
    return self.q(css=css).html
