QmlProfiler: Don't connect all the binding loop markers in Overview

It's a good idea to start a new path for each of them. They're quite
unrelated after all ...

Task-number: QTCREATORBUG-11099
Change-Id: Id47e482b948a0827018c71ddc8d13e2e69829bc4
Reviewed-by: Kai Koehne <kai.koehne@digia.com>