Request for fine grained time tracking support (Client/Project/Activity)

Working as a consultant I typically work for multiple clients and per client doing multiple projects and per project multiple activities.
Instead of creating a job for each client-project-activity combination and with that unnecessary duplicating Job parameters, it would be nice if the client is automatically selected using GPS and then showing all projects which can be selected to register time for.

Then when defining a new project a default list of activities is added to the project which can be overwritten at any time.

A client may have zero or more projects and a project may have zero or more activities. If this is supported then the current utilization of your app still works and is supporting a finer granularity