Add capability to check/uncheck all items on page, refactor JavaScript surrounding it

Signed-off-by: Stuart Olivera <stuart@stuartolivera.com>
Added "todo-list" class to list tables

Signed-off-by: Stuart Olivera <stuart@stuartolivera.com>
Hide "back" button on "new" page

Signed-off-by: Stuart Olivera <stuart@stuartolivera.com>