support for DESC/NULLS FIRST/NULLS LAST

Hi, all

TODO Item:
- Add support for DESC/NULLS FIRST/NULLS LAST when creating indexes.
had been completed and tested the debug configuration's build.
It works finely.

But, I built it at release configuration. Something is wrong.
The modified dialog was not displayed, whereas old style. And easy to got
a invalid memory access.
I think the modified xrc file not be included to release build, but the
code is done.

The .xrc .h and .cpp files had been modified, what missed?
I am newbie in wxWidgets and C++.
Any suggestion.
Thanks.

-----------------------------------------------
Quan Zongliang
quanzongliang@gmail.com
CIT Japan:  http://www.cit.co.jp