Checkmk Werk 11613: Fix resetting if GUI related global settings

ID: 11613 Title: Fix resetting if GUI related global settings Component: Setup Level: 1 Class: Bug fix Version: 2.1.0i1 When trying to reset global settings that apply to the GUI, the setting was not immediately reset to it's default value. The GUI was still using the previously set value until the sites apache was restarted.