[Dorset] Can I move the beginning of my root partition (to increase size) and still boot normally?

Hi, A longish story. I tried to upgrade from Ubuntu 22.04 to 24.04 several weeks ago following Ubuntu's standard notification. That attempt finished very quickly, doing nothing, and then I saw that Ubuntu had withdrawn the advice. A while later they re-instated the notification so I dutiful

[Dorset] "Authentication required" for login keyring on Ubuntu

A few weeks ago, without knowingly making any change, we started getting these messages (as above) when opening Chromium. It was very simple to get around - simply type ESC. So it was only annoying, not a real problem. But I looked for a complete solution and there was only, repeated many ti