Another possible improvement

Hi,
Another issue I found:

Create a Panel
Put Flex grid sizer on the panel
In one of the slots put a Box sizer
Observe that in the Properties window the focus is set to the last
slot of this box sizer and not on the box sizer itself.
I still have wxGlade 0.7.2 installed on my Windows box and there the
focus is set on the sizer itself

Is there a reason this was changed?

Thank you.