Small fix for CellRendererSpinButton

Just figured out a solution to my last problem ( custom 
CellRendererSpinButton doesn't update the value if you use mouse-only 
input ).
Add the following inside the START_EDITING sub:

---

 $spin_button -> signal_connect(focus_out_event => sub {
  
   $spin_button -> update();
   $cell -> signal_emit(edited => $path, $spin_button -> get_value());
  
 });
---

This also lessons the infuriating behaviour of the spinbutton to drop 
all changes if you stop scrolling ( with the mouse ) and then start 
scrolling again in quick succession ( gets interpreted as a double-click 
). I don't know about everyone else, but when I use spin buttons, I hold 
it down to spin rapidly for a while, then when I get closer to the value 
I want, I use quick little hits of the spin button to get to the final 
value. If I did this, the spinbutton used to revert to the original 
value ... now it just updates to the current value and then destroys 
itself. You can then click in it again and start off from where you 
where. Not perfect, but better.
--
Daniel Kasak
IT Developer
NUS Consulting Group
Level 5, 77 Pacific Highway
North Sydney, NSW, Australia 2060
T: (+61) 2 9922-7676 / F: (+61) 2 9922 7989
email: dkasak@xxxxxxxxxxxxxxxxxxxx
website: http://www.nusconsulting.com.au

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