new constructors taking wxSize for the gap argument is preferred. The same
applies to wxFlexGridSizer as well.
+- wxBoxSizer::AddSpacer(x) now adds space in the direction of the sizer only
+ and not in both this and the orthogonal directions. This behaviour is what
+ most of the people expect but if you really relied on this overload adding
+ space in both directions you should change your code to use AddSpacer(x, x).
+
Changes in behaviour which may result in compilation errors
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