Bug#916979: Octave recent build only has grahics toolkit gnuplot; qt and fltk are missing

[Clinton Winant]

Package: Octave
Version: 4.4.1

Having upgraded Debian Buster to octave package (4.4.1-2+b1) I find the qt
and fltk graphics toolkits are no longer available.

octave:2> name=graphics_toolkit()name = gnuplotoctave:3>
available_graphics_toolkitsans ={
  [1,1] = gnuplot}

 These are critical components of the octave system.

I am using Debian 4.18.20-2 (2018-11-23) x86_64 GNU/Linux