Add config setting for the debug (item ID and meta, plus EMC value and EMC type) tooltip

I personally find the debug tooltip annoying, but some people like it. I added a config setting that currently defaults to true, that keeps the behaviour of the tooltips the same, unless you disable them in the config.

~~This is defaulting to true, so I'm not stepping on pahimar's toes.~~
Not anymore :) I find it annoying to default to true.