Use the real name of Luniv (https://github.com/luniv)
WICKET-5676 Double click causes internal error using AjaxFallbackDefaultDataTable

Use the default channel name for Ajax navigation links

(cherry picked from commit 7ff5623b9af4e4b1ddfd3dee8d5bfde775de09c0)
Improve comments, logs and variable names. No functional changes

(cherry picked from commit 5af8ea44e905fb70390e129e93ff1862ea1ff30d)