Replace on with timestamp as the checkbox value
Replace on with timestamp as the checkbox value

In the default view. This will allow us to validate the timestamp
when making actions in the publish list view.

Re a45a9c3ca42d26fb218a1f9bfa8ee4e0aeec54fa

jensscherbl/symphony,jensscherbl/symphony,symphonycms/symphony-2,bauhouse/sym-todo-list,bauhouse/sym-todo-list,symphonycms/symphony-2,michael-e/symphony-2,michael-e/symphony-2