Improve the order in which the content types are shown

Problem/Motivation

If you create a content type named 'ab' and you have a content type named 'Basic Page' you will see in the configuration page (admin/config/content/onlyone) this order:

Basic Page
ab

This is because the asort() function is used in the _onlyone_process() function but don't take in count the case sensitive.

Proposed resolution

Use the SORT_NATURAL | SORT_FLAG_CASE params in the asort() function.

asort($array, SORT_NATURAL | SORT_FLAG_CASE);

Remaining tasks

None.

User interface changes

None.

API changes

None.

Data model changes

None.