Added wxInfoBar::Dismiss().

Add a method to conveniently hide the info bar and update the parent layout.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@62284 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

src/generic/infobar.cpp

@@ -240,6 +240,11 @@ void wxInfoBarGeneric::ShowMessage(const wxString& msg, int flags)
     }
 }
 
+void wxInfoBarGeneric::Dismiss()
+{
+    DoHide();
+}
+
 void wxInfoBarGeneric::AddButton(wxWindowID btnid, const wxString& label)
 {
     wxSizer * const sizer = GetSizer();