type-as-you-go for searching for something that is only in description pane

[jtorjo]

If type-as-yo-go searching for something that is only in description pane -> when I type something only valid in description pane, the list view does not update.
Such as, going from "o" to "oc" -> at this point, the list view should show nothing selected, as there is nothing with "oc" in the list (only in description pane)

Search next/prev -> does not work when something is only found in description pane

IMPORTANT: if searching works for something, but it's only visible in the description pane, i will show that by showing all line in the view in a slightly different background (so that the user sees his search is successful)