color-settings: Fix ColorSettings release
The dialog should not be destroyed, since it is owned by the GtkBuilder,
which is released at the end of main()
. Also, when the dialog is
embedded in the setting manager, the wrong connection of
color_settings_dialog_destroy()
causes segmentation fault, since the
pointers accessed are not the right ones.
Fixes #211 (closed).
Edited by Gaël Bonithon