Change so that you only can create roles with roletypes that you have permission to create

[dakaza98]

At the moment, a person appointed to a role can create a role with any roletype. The person should only be able to choose the roletype he/she has permissions for.

The permissions are like this:

Admin - all roletypes

FUM - Styrelse only

Styrelse - Presidium only

Presidium - Group leader and engaged

Group leader - engaged only

Engaged - can not create roles

A design suggestion is that all options that the person can’t choose is made unclickable with the disabled attribute. That way the person can still see that there exists other roletypes but can not use them.