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/gtk/infobar.cpp

@@ -177,17 +177,26 @@ void wxInfoBar::ShowMessage(const wxString& msg, int flags)
     UpdateParent();
 }
 
+void wxInfoBar::Dismiss()
+{
+    if ( !UseNative() )
+    {
+        wxInfoBarGeneric::Dismiss();
+        return;
+    }
+
+    Hide();
+
+    UpdateParent();
+}
+
 void wxInfoBar::GTKResponse(int btnid)
 {
     wxCommandEvent event(wxEVT_COMMAND_BUTTON_CLICKED, btnid);
     event.SetEventObject(this);
 
     if ( !HandleWindowEvent(event) )
-    {
-        Hide();
-
-        UpdateParent();
-    }
+        Dismiss();
 }
 
 GtkWidget *wxInfoBar::GTKAddButton(wxWindowID btnid, const wxString& label)