Problem/Motivation
When using the option Exposed Grouped on a views filter, there is a limitation of 20 items to sort. This is because the delta of the form is set to 10.
Proposed resolution
Make the #delta value dynamic based on the amount of items of the grouped filter.
Remaining tasks
None
User interface changes
None
API changes
None
Data model changes
Original report by YoyoS
The delta should be increased when you need to order more than 20 fields, -10 -> 10 isn't enough.
I propose to have a delta of 30 for ordering 60 fields.