This review request is for the 2nd part of "selecting review request

field" project. The goal of this project is to have tab-based keybaord

shortcuts on review request page fields. (e.g., hitting tab-d focuses 

"Description" field).
This project is dependent on "Keyboard shortcut registry"
The project includes a ShortcutHelpDialog which dynamically renders

available keyboard shortcuts on each page as well as their descriptions.

A screenshot is attached below.

Press tab and h on review request page and the dialog is shown (the

shortcuts are displayed as well).
Press tab and d on review request page and Description field is

focused.
Press tab and h on dashboard page and the help dialog is shown.
All unit tests passed.