Add client name to project drop down

[tmiller]

This adds support for showing the client name in the settings for a "Timer" in the "Project" drop down. It should resolve #10. Below is a text representation of how the change looks.

Previously

Project 1
  Task 1
  Task 2
Project 2
  Task 1

Now

Client A - Project 1
  Task 1
  Task 2
Client B - Project 2
  Task 1