When compiling xfce4-settings with --enable-pluggable-dialogs, xfce4-display-settings and "File Manager" (thunar preferences) are not integrated and have the same behavior as without --enable-pluggable-dialogs. How to reproduce: - Compile xfce4-settings with --enable-pluggable-dialogs option - Launch xfce4-settings-manager - Clic on "Display" - Display setting is not integrated in the windows.
Fixed in git master for xfce4-display-settings. Other apps like thunar should handle this themselves.