Show past feedback in responsive table

Table was missed by mobile redesign. Also tidies up trip management
(delete column no longer sortable).
Add additional sorting based on instance values

This won't allow sorting based on current checkbox values (that is
absolutely possible, but will postpone for now - see
http://fooplugins.com/footable/demos/sorting.htm). However, it's a
useful enough feature for WSC to quickly see which trips aren't approved
or for an admin to see which trips have become FCFS.