Automatic units in memory metrics

[SinyaWeo]

Automatic unit conversion for memory metrics via bytes2human in stats.py Memory class:

       display_themed_value(
            theme_data=memory_stats_theme_data['VIRTUAL']['USED'],
            value=f"{bytes2human(sensors.Memory.virtual_used(), '%(value).1f %(symbol)s')}",
            min_size=6
        )
        display_themed_value(
            theme_data=memory_stats_theme_data['VIRTUAL']['FREE'],
            value=f"{bytes2human(sensors.Memory.virtual_free(), '%(value).1f %(symbol)s')}",
            min_size=6
        )
        display_themed_value(
            theme_data=memory_stats_theme_data['VIRTUAL']['TOTAL'],
            value=f"{bytes2human(sensors.Memory.virtual_free() + sensors.Memory.virtual_used(), '%(value).1f %(symbol)s')}",
            min_size=6
        )```