Provide more user friendly error message when cant delete sprint because is referred to issues in an archive project

When trying to delete a sprint the following error message is generated which is very misleading.

We couldn't make that happen because you don't have Schedule Issues permission.

The user does have Managed Sprint and Schedule issue permission. The reason for the error is that the Sprint was set to issues to another project which was in Archive. 

It will be nice to provide a more meaningful error message.

To be able to delete the sprint:

• Unarchive the project 
• Delete the sprint
• Archive project