* Fixes for wx2.5.5, patch by Greg Hazel <ghazel at gmail dot com>

* Fixes for wx2.5.5, patch by Greg Hazel <ghazel at gmail dot com>

I only changed two things in the patch
* added a check for wx2.4 that does not seem to have sizer->Detach
* commented out the wxCheckVersion in open.cpp, which broke layouting under wx2.5.3
  (what was the intended behaviour ?)

* Added core support for a sorted by genre view