auto-save feature

**Matt Kilbride** ([Bug 58234](https://bz.apache.org/bugzilla//show_bug.cgi?id=58234&redirect=false)):
I would really like to see an auto-save feature that keeps a temporary copy of un-saved changes to a test plan. I've had some devastating experiences of test plan loss when my laptop has crashed, and this could save me from those times of forgetfulness.

Today's loss was several hours of tedious hand-crafted replication of form interactions, brought on by a laptop sleep failure.

Thanks, Matt

OS: All