Checkmk Werk 10565: Fix processing of custom global settings

ID: 10565 Title: Fix processing of custom global settings Component: WATO Level: 1 Class: Bug fix Version: 1.7.0i1 When working with GUI plugins that are registering custom global settings by creating a plugin for the default setting below <tt>local/share/check_mk/web/plugins/config</tt> and a global setting declaration for WATO below <tt>local/share/check_mk/web/plugins/wato</tt>, the edit dialog of the global setting did not work in all cases as expected. Some times a <tt>KeyError: '<setting-name>'</tt> exception was shown in the GUI.