Need to manually configure savehist - see instructions.
This is simplest implementation, and a little dicey:
* First time in session that you try to use prior session's settings,
you just get the path, not the name
* I could make an additional map between names used and paths,
* and that may be necessary, since it will be unapparent whether or
not the paths for the names have established.
* There's no way to remove entries, besides editing the history file
* Would like to implement `Meta-e' "edit current entry",
* where changing the entry is preserved
* and deleting the line then concluding removes the entry completely
* carriage return ends edit mode.