Make Show ... entities persistent

Some annoying behaviour that might be easily fixed, don't know?

The Show x entities select box is not saving its contextual setting. To reproduce Go to Soup Selection multiple choice options and add soup types until there are more than 10 (less than 25)

Now in the Multiple choice options list there will appear a second page, next and last links, because there are more than 10 options. Now change it to "Show 25 entries". Now all options will appear. Now Edit any option and save the changes. Now you will see that "Show 25 entries" changed back to the default "Show 10 entries". Every time after editing an option the "Show x entries" will return to its default. The improvement would be that the choice would "Show x entries" would be persistent per selection list at least until end of session.