Changes to "AjaxPalettePanel" components in Console are not saved when the previous step button is pressed before submitting the wizard form

Steps to reproduce the issue:

1. Login to the Admin Console;
2. Go to the list of users and edit one user;
3. Go to a wizard step where you see a "AjaxPalettePanel" component (which is a panel that contains 2 big "<select>" fields, the one of the left shows a list of "Avalaible" items, the one on the right a list of "Selected" items);
4. Edit that list (e.g. the "Groups" step, add or remove one group);
5. Click the "Prev" button to go to the previous step of the wizard;
6. Submit the wizard by pressing "Finish".
7. Edit the same user again, you won't see the just made changes.