Remove command in label to use kbd (not a proper use of label).
Remove useless checks for variables that should always be defined.
Fix help dialog not displaying proper text after clicking on the reset button.
Revert "Fix help dialog not displaying proper text after clicking on the reset button."

This reverts commit 5d0e0cd50373d02aaf6e9f0289ade1f1a22fbe5f.
Another fix must be found.
Real fix for doc update when page has been reset.