Disable logging time to projects

[#1]

Description - Currently we can turn off "log hours" at the project level, but users still see it on their timesheets AND people with manage access still have the ability to track time. It would be amazing if we could turn off completely at the project (or task level) the ability to log hours which in turn prevents a task from showing on a timesheet 

Why is this feature important to you - we want users to track time to specific tasks and keep their timesheets as easy to view as possible so it's easy for workers to track time and easy for project owners to view

How would you like the feature to work - a simple option at the project and/or task level to disable the ability to log hours.

Current Behaviour - turning off 'log hours' at the project level still shows assigned tasks on timesheets and users with manage access can still log hours.