Include graphics objects with hidden handles in axes limit calculation (bug #63095). * libinterp/corefcn/graphics.cc (get_children_limits): Get handles to all axes children including those with hidden handle visibility. Add BIST. * libinterp/corefcn/graphics.in.h (text::update_position): Do not automatically change "zliminclude" property. Axes labels are implemented as text objects, and we don't want their extent to be included in the axis limit calculation.

classdef class_bug_55758 < handle
  properties
    value
  endproperties

  methods
    function self = class_bug_55758 (val)
      if (nargin < 1)
        val = 0;
      endif
      self.value = val;
    endfunction

    function delete (self)
      global class_bug_55758_dtor_called;
      class_bug_55758_dtor_called = true;
    endfunction

    function ret = subsref (self, idx)
      ret = self.value;
    endfunction
  endmethods
endclassdef