kivy: fix #6262
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@@ -61,7 +61,7 @@ class QRDialog(Factory.Popup):
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self.app = App.get_running_app()
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self.title = title
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self.data = data
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self.help_text = data if show_text else help_text
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self.help_text = (data if show_text else help_text) or ''
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self.failure_cb = failure_cb
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self.text_for_clipboard = text_for_clipboard if text_for_clipboard else data
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