Since the find/replace functionality was changed to remove modal dialog boxes for informational responses and replace them with a message area in the find bar, it doesn't keep consistent state between that message area and the input box. If a user changes the input box in any way (clears it or enters a different term), the message box should reset itself to match state. It doesn't.

Steps to reproduce:

1. Enter a search term you know isn't in the document.
2. Note the find bar says "Search key not found" in the new message area.
3. Clear the search box and enter a new term.
4. Imagine you were distracted for a moment and forgot what you were doing.
5. Look back and see you've entered a new term where it says "Search key not found". That's not true, because you haven't searched for it yet.

Also, it consistently says "Reached the end of the document" when it wraps, regardless of direction, even when a user is searching backwards and it has reached the start of the document and wrapped to the end. It should really say "Reached the start of the document" then...

(By the way, from my perspective this was an intrusive UI change which left me wondering if search was broken, because previously I'd positioned the find bar to the right of another bar, as it had sufficient space to fit all its buttons. When I upgraded to 4.3 I couldn't see the text area that'd been added for messages. After I dragged the bar around I noticed messages were being displayed in it. This change wasn't mentioned in the release notes for 4.3. It should've been.)