There are two different programs in the Configuration menu to change Window Manager settings: one is called "Window Manager Settings" and allows configuration of the Compositor, some focus settings, workplace settings, etc. and the other is simply called "Window Manager" and has the settings to change window borders, titlebar font and some focus and workspace settings. It is very confusing to have two different Window Manager settings apps that change different settings. 
The functionality of these two setting programs should be merged into just one, with all the focus, keyboard shortcuts and workspace settings in "Window Manager Settings" and the window border settings moved to "Appearance".