fixed potential notice in csv export with link element when it contained no data
removed debug from itagg gateway code
replaced jerror with thrown error
improved error handling in csv export js code
changed: element icon replacement in list view. Now priority is given to {elementname}_{value}.{ext}, then {value}.{ext} then {label}.{ext} - avoids issue where 2 elements in the same list use replace icons and have the same recorded values