initial wxAboutStuff committed

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Francesco Montorsi <f18m_cpp217828 at ...> writes:
> I think that implementing a GtkExpander-like widget would be the best 
> thing to solve this problem (and enhance wxWidgets of course ;)).
> 
> So, I think we should create a wxExpandiblePanel.

Isn't it what folded panels in contribs already do in the form of generic
implementation? If renderer/art provider for colapsing bitmaps could be added
and native gtk version added it seems complete then.

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