improvements in functions:
def print_private_properties(source, not_empty=True, skip_prefix=None,
skip_uppercase=True)
def save_private_properties(source, _file, not_empty=True,
skip_prefix=None, skip_uppercase=True)
add parameters to skip empty properties, skip properties with certain
prefix or skip uppercase properties, these common conditions are
collected in one new function:
def __correct_private_property__(name, value, not_empty, skip_prefix,
skip_uppercase)

remove property feature in methods:
hra_math.model.parameters.poincare_plot_parameters_manager.PoincarePlotParametersManager.__parameters_ids__(self)
hra_math.time_domain.poincare_plot.poincare_plot.PoincarePlotManager.__data_filenames__(self)
to avoid execution of the method during introspection

add in method:
hra_math.time_domain.poincare_plot.poincare_plot.PoincarePlotManager.__save_members__(self)
skip all movie properties when movie_name property is None