Check_MK Werk 5918: New Theme: Fixed several bugs

ID: 5918 Title: New Theme: Fixed several bugs Component: Multisite Level: 1 Class: Bug fix Version: 1.6.0i1 This patch includes fixes for: - Dropdown of Virtual Host Tree Snapin - Server Time Snapin - White triangle on white ground on grouped services - White text on white background (e.g. new reports) - Flat design of Bulk discovery (is now more align to similar progress sites) - A layer mismatch of popup menu of a service and the service if a service is stale - New logo for reports