LoadEventNexus change tofmin to be at the lowest event's tof#37815

AndreiSavici merged 3 commits intomantidproject:mainmantidproject/mantid:mainfrom

peterfpeterson:ewm6796_loadeventnxs_tof_min_bugpeterfpeterson/mantid:ewm6796_loadeventnxs_tof_min_bugCopy head branch name to clipboard