Update the command list when a new command is added or an existing command's name is changed

[PankajBhojwani]

Summary of the Pull Request

When a new command is added or an existing command's name is changed, make sure we update the top-level command list so that it appears there when the user navigates back to the actions page

Detailed Description of the Pull Request / Additional comments

Added a new _CommandListDirty flag to the ActionsViewModel. When a new command is added or a command's name is changed the flag is set. When navigating to the top-level actions page, we regenerate the _CommandList if the flag is set.

Validation Steps Performed

Adding a new command or updating a command's name is now reflected correctly when navigating back to the actions page.

PR Checklist

• Closes #xxx
• Tests added/passed
• Documentation updated
  • If checked, please file a pull request on our docs repo and link it here: #xxx
• Schema updated (if necessary)