When Configure Column that show in Issue Navigator, the option provide Issue Type.

However, the column only show Icon.
User will prefer it can show the Issue Type NAME too.

This is the use case provided by user:

You have large project with large number of issue type (and sub task issue type)
You can't filter subtask issue type for specific issue type, so finding a way to put in evidence subtask type with more then an icon could be usefull