bug#63648: 29.0.90; project.el: with switch-use-entire-map, switch-project errors on non-project commands

[Drew Adams]

> Or maybe we can just change how C-x C-j
> behaves so it works intuitively with C-x p p? 

Please don't change C-x C-j.

If you want to have another command that does
whatever you want then do that.  Bind that to
whatever keys you like in a particular mode.
But please don't change the behavior of `C-x C-j'.