Find: Unbreak find/replace next/previous/all when focus is in tool bar

Broke with 222be8f2ee03fc01c90bcc359fca16d172794c93

Task-number: QTCREATORBUG-13351
Change-Id: I12cf4681dc9f264c46ee307d622a5aa74f6800c5
Reviewed-by: Daniel Teske <daniel.teske@digia.com>