Revert "Update seedqreader.py by pythcoiner"

This reverts commit 2daac8a.

Author: tadeubas

seedqreader.py

@@ -606,9 +606,10 @@ def on_slider_move(self):
 
     def on_delay_slider_move(self):
         self.ui.delay_size.setText(f"QR delay: {self.ui.delay_slider.value()}")
-
-        if self.display_qr:
-            self.display_qr.delay = (self.ui.delay_slider.value())
+        try:
+            self.display_qr.set_delay(self.ui.delay_slider.value())
+        except:
+            pass
 
     def on_btn_generate(self):
         data: str = self.ui.data_out.toPlainText()