Merge the new GUI tests from SOC2010_GUI_TEST branch.

Add a lot of tests for many wx GUI classes.

Add tests using the new wxUIActionSimulator class but disable them under OS X
as too many of them currently fail there.

Refactor the test suite to make organizing the existing tests and adding the
new ones easier.

Improve documentation using the information gathered while testing the
classes. Also update the documentation of the testing system itself.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@65386 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

interface/wx/combobox.h

@@ -237,7 +237,7 @@ public:
 
         @note For a combobox with @c wxCB_READONLY style the string must be in
               the combobox choices list, otherwise the call to SetValue() is
-              ignored.
+              ignored. This is case insensitive.
 
         @param text
             The text to set.