Provide a message for prioritizing tables when worked doesn't meet skill require

[b0rsuk]

I would post it in "Cheapest ideas", except this is rather important.

I "debug" tables jobs by selecting a colonist and right clicking on a table to prioritze job. It will often display a helpful message. BUT if he's not working because he doesn't meet skill requirements (the slider), there is no message at all. Hard to understand what's going on if you haven't seen it.