Make administration more fine grained so some admin tasks can be moved to project administrator

Currently tasks such as workflow customization, screen schema and permission schema are done at administration level. This means that as we have a number of project groups we either have to allow a member of each project group to be an admin, or set up a dedicated administration team to do these tasks.

The first option has resulted in global setting being changed, causing problems for some projects.

The second option is costly.

By creating a project administrator, who could be the project leader and allowing him to undertake some of these tasks without needing jira-administrator rights would solve this problem. If the project leader could also set up user groups within his own project, that would also allow complete isolation of a project if needed.