zoom & zoom_rect are not working on an axis inside a frame

Reported by Antoine Monmayrant

BUG DESCRIPTION:
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If an axis is a children of frame instead of a direct children of the figure, the GUI zoom (and the underlying zoom_rect function) are not working properly.

ERROR LOG:
----------
None, but one cannot zoom on the axis using the zoom icon or the zoom_rect function. Scroll-wheel zooming still works.


HOW TO REPRODUCE THE BUG:
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// Two axes in one figure:
// left one is inside a frame
// right one is directly attached to the figure
// GUI zoom and zoom_rect don't work on the left plot

h=scf();
h.axes_size=[800,600];
a_right=newaxes(h);
a_right.axes_bounds(3)=0.5;
a_right.axes_bounds(1)=0.5;
plot2d()
a_right.title.text="GUI zoom & zoom_rect work here";

frame_left = uicontrol(h, ...
   "style", "frame", ...
   "backgroundcolor", [1 0 1], ...
   "Position", [0,0,400,600]);
a_left=newaxes(frame_left);
plot2d();
a_left.title.text="GUI zoom & zoom_rect DO NOT work here";




OTHER INFORMATION:
------------------

added 6.1 nightly or development Bugzilla Graphic interactions Minor labels