Resize wizard dialog on show

Setting default size is not enough if the wizard was already shown.

issue8178
review56641003

tryton/gui/window/wizard.py

@@ -417,6 +417,7 @@ class WizardDialog(Wizard, NoModal):
         else:
             width, height = -1, -1
         self.dia.set_default_size(max(200, width), height)
+        self.dia.resize(*self.dia.get_default_size())
         self.dia.show()
 
     def hide(self):