New Profile - Sorting customisation added to series management

We have just updated the series management on the profile, adding the option of changing the order with a custom sort.

To update your sort:
- Enable 'custom sort' in the sorting section on your series page, like so:
Custom sort

- A new button "Update your sort" appears on the top of the list.
New 'update sort' button

- Once the 'custom sort' mode is enabled, you can move the series around as you wish in your list.
Move around series before saving them.

- Confirm your custom sort using the 'Save' button.