We have cases where we add purely integer values in custom fields containing only predefined options. However, when we sort the issues in the Issue Navigator they are sorted in alphabetical order.

Example:
Issues containing a field called severity having values 1,2,5,12,21 will be sorted 1,12,2,21,5 where it should logically have been sorted 1,2,5,12,21.

Suggestion:
Either automatically deduce that the field is purely integer and treat the values as integers when sorting.

or

Allow for user defined sorting algorithms. Possibly with predefined options such as alphabetical and numerical.