It is often useful to be able to disable certain parts of a window’s
frame. For example, a window may hint to the window manager that it
doesn’t want a maximize button. Sawfish allows all parts of a
particular class to be disabled or enabled on a window by window basis.
However, not all frame styles will support this (it depends on the
removable property, Frame Part Definition).
Enable all frame parts that are a member of class in window.
t if the frame part class has been removed from
Disable all frame parts that are a member of class in window where possible.