Assure Update window width does not break OpenQA

Refrence: #246 (comment)

qui/updater/updater.py

@@ -228,6 +228,7 @@ def cell_data_func(_column, cell, model, it, data):
         # Wide enough for details section to show update progress.
         # But still less than 1024 pixels to do not break OpenQA tests.
         width = max(width, 1000)
+        width = min(width, self.main_window.get_screen().get_width() - 12)
         height = min(
             int(width * 1.2), self.main_window.get_screen().get_height() - 48
         )