NAME
      RethinkLayout -- Relayout and render the layout. (V39)

  SYNOPSIS
      RethinkLayout( layout, window, requester, refresh );
                      a0        a1        a2

      void RethinkLayout( struct gadget *, struct window *,
                              struct requester *, bool )

  FUNCTION
      Relayout and refresh the layout page. Call this function after
      a call SetGadgetAttrs() returns 1 to display the changes in the
      layout.  According to BOOPSI rules, a gadget will return a value
      of 1 from OM_SET to tell the application to refresh. This is what
      this function is for. Basically, it will call the GM_LAYOUT and
      GM_RENDER methods of the layout.

  INPUTS
      layout = the layout to refresh. Doesn't have to be the topmost
                  object in the hierarchy, if the changes do not affect
                  it.
      window = the window to which the layout (or its parent) is
                  attached to.
      requester = the window's requester, or NULL.
      refresh = whether layout.gadget should also refresh the display.

  NOTES
      This function emulates a DoGadgetMethod() on V37 and V38 systems.

      The refresh flag is provided for several reasons. First, when using
      LAYOUT_DeferLayout, you should not refresh upon receiving a
      LAYOUT_RequestLayout notification. Second, datatypes have an
      asynchronous layout, and should not be attempted to refresh before
      that is finished. wait for dta_sync, and then refreshglist( layout,
      window, requester, 1 ).

  SEE ALSO
      intuition.library/refreshglist(), intuition.library/setgadgetattrsa(),
      intuition.library/DoGadgetMethod()