Roles: Page into Modal AND new Process Release Permission

[iaktern]

• Put the Role Configuration Page with the Permission Mgmt into a Modal. Currently, it is a page - problem: clicking into the navigation menu or the back button will discard all changes without saving them. since it is not easy to put an event listener everywhere to know if someone left the role pages, just put everything into a modal. in this way it is easier to register if someone leaves the role configuration and a hint can be shown that changes get lost
• Add a new Process Release permission to create new versions for processes. Use it in the BPMN editor for creating new versions. Deactivate the versioning button if the permission is missing and show a tooltip.