Fix 8f14894024: Badge widths were not updated on interface scale change. (#13630)

Prepare GUI badge class lists in OnInit() method of Windows, so that they handle scaling changes.

src/picker_gui.cpp

@@ -238,11 +238,14 @@ void PickerWindow::ConstructWindow()
 
 	this->FinishInitNested(this->window_number);
 
-	this->badge_classes = GUIBadgeClasses(this->callbacks.GetFeature());
-
 	this->InvalidateData(PICKER_INVALIDATION_ALL);
 }
 
+void PickerWindow::OnInit()
+{
+	this->badge_classes = GUIBadgeClasses(this->callbacks.GetFeature());
+}
+
 void PickerWindow::Close(int data)
 {
 	this->callbacks.Close(data);