Log editing in JOSM to a temporarily file, and restore

[cetest]

JOSM stable and dev versions tend to crash now and then. It seems we have to live with that.
However, loosing recent edits is a real PITA.
Frequent uploading helps but needs discipline.

A small edit loggin file, that gets erased on upload, and that may be run automatically
if the user asks so on restart might resolve a lot of frustration.
On startup after a crash JOSM basically needs to reload the current viewport (OSM data) and carry out all logged actions to create a Eureka feeling.

Alternately a automatic save in OSM format every minute would do the same, but needs a lot
of resources on large edits.