jupyter-theme, has been installed, but when jupyter auto-save, the top menu bar becomes 2 lines due to auto-save, which makes the whole page drop and jump, which is very uncomfortable.

so solve how to break:
1, turn off the text prompt when saving automatically;
2, change the text prompt to 0 seconds, so that before we feel it, we can only see the page flickering past
3, make the font of the real menu bar smaller, and then let it put down
4, make the words trusted, Python3 on the right smaller