Checkmk Werk 11835: Remove options to change foreground, background, canvas color of graphs

ID: 11835 Title: Remove options to change foreground, background, canvas color of graphs Component: Reporting & Availability Level: 1 Class: New feature Version: 2.1.0i1 When adding graphs to views, reports or dashboards, users had the option to change any of the colors mentioned above, which was not useful and has been removed. Graphs which already have any of these options set will continue to use the user-defined colors. However, these custom colors will be removed when editing and saving the graph the next time.