Show empty date value as 0000-00-00 00:00

Not 1970-01-01 00:00:00
Try to make it so only non-team-members are listed

https://github.com/Lord-Matt-NucleusCMS-Stuff/lmnucleuscms/commit/3b4e236449a2212ff2440f8654197a9c01667166#diff-34cb57d57a38d46e6406db82a324c224R2337