Autosave or other things to make it less likely for people to lose their work

[BramOtte]

Currently when MCHPRS crashes it often results in people losing progress.
Having an auto save option might prevent this from happening to some people, but we should implement it properly to prevent destroying peoples SSDs or corrupting their plot files.

Currently when a plot crashes it does seem to attempt to save the plot, but yet there are still occurrences of people losing some of their work, perhaps because a crash occurred outside of the plot logic or inside of the cleanup logic.