Progress bars

- [x] Basic progress bar for projects
- [x] Editable project status if allowed
- [ ] Create a task for a project, including optional assignment to a user
- [ ] Edit a created project task
- [ ] Progress bar intelligently counts tasks in the middle part if there are any defined (aka project status "tasks")
- [ ] Assigned users and project owners can close tasks

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Move to new issue:
* Show assigned and completed tasks on user profiles