* step one, it's a nodetree function, not node specific

* remove all calls to old get_and_set_gl_scale_info

* remove function get_and_set_gl_scale_info

* elaborate update_gl_scale_info docstring

* time to cleanup

* adjust comment reflects intent

* calling get_dpi_factor here may be sufficient

* restage

* remove props that are not used

* make them use the same code