Olli KeyboardManager and Help Modal

[Matt-Blanco]

Changes

• Moves the controls of the Tree View to a separate KeyboardManager instead of the previous switch statement
  • The KeyboardManager handles adding new controls and their respective events
  • Has a specific button press to display a help modal containing documentation on each control
• Add new KeyRegistration and KeyboardAction types to describe each of the controls
• Adds a description under the root DOM node on how to open the help modal

Appearance

Tree with the help comment:

Help modal:

[Matt-Blanco]

Updated the modal to right align the control descriptions: