Checkmk Werk 7942: Fixed dashlet refresh.

ID: 7942 Title: Fixed dashlet refresh. Component: Multisite Level: 2 Class: Bug fix Version: 1.7.0i1 Various dashlets didn't refresh automatically after they have been rendered initially, e.g. the globes for host/service statistics. This was a regression in the 1.6.0 branch and has been fixed now.