[BUG] Single Page Onboarding set to Continue

[jbmaruh]

Describe the bug
When utilizing Onboarding with a singular page the primary button maintains the "Continue" state rather than the "Close" state.

To Reproduce
Steps to reproduce the behavior:

Trigger an Onboarding UI with a single page using the example invocation, or any other:
~/Applications/IBM\ Notifier.app/Contents/MacOS/IBM\ Notifier -type onboarding -payload "{\"pages\":[{\"title\":\"First page's title\",\"subtitle\":\"First page's subtitle\",\"body\":\"First page's body\"}]}"

Expected behavior
Expected to appear by default as if the primaryButtonLabel is set to close.
~/Applications/IBM\ Notifier.app/Contents/MacOS/IBM\ Notifier -type onboarding -payload "{\"pages\":[{\"title\":\"First page's title\",\"subtitle\":\"First page's subtitle\",\"body\":\"First page's body\",\"primaryButtonLabel\":\"Close\"}]}"

This bug does not occur when the pages are two or greater and correctly shows the Continue button until the last page is reached, which then reverts to Close.

Desktop (please complete the following information):

• OS: macOS Ventura 13.5, macOS Ventura 13.4.1, macOS Sonoma B4
• Project version: 3.0.0 B104

Workaround:
Add "primaryButtonLabel":"Close" to the page creation for a singular page deployments.