Add support of full personal data for FileExtensions

1. updatedBy and createdBy fields. It should include first name, last name, and nickname. Apart from that, it can be just System when that change was not done by the user (for example default file extensions records). Also, there should be a possibility to sort that field. On UI it comes in the following format:
1. firstName (e.g John)
2. lastName (e.g Doe)
3. userName (e.g john_doe, if a user exists or System otherwise)
That means that it should be possible to sort it correspondingly.

2. Add description field for the file extension record