[paragui-users] patch

[H. C.]

- SetIcon(const char* filename), SetIcon(SDL_Surface* icon) for PG_Window's
title bar
- another wrapper function for PG_Widget::my_internaldata->quitmodal which
allows one to set it to false
- removed unnecessary Redraw() call in PG_RadioButton::SetText(...)

with kind regards,
    H. C.

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