[#63195474] Kingdom hall is not mandatory in the congregation.. this
removes a cricular reference.
[#56185728] Replace the 1980 date placeholders with dd/mm/yyyy
[#56185728] Consistently put an hr above edit/create buttons, and a line
break below. Consistently close elements, e.g. <br />, not <br>
[#56185728] Kingdom hall list postcode column should be sortable