The South Orange-Maplewood School District voted Thursday night to reappoint a high school principal who is facing a charge accusing him of assaulting a student last year. Frank Sanchez, principal of Columbia High School in Maplewood, had been on administrative leave for six months following the accusation. The charge stems from an incident with a female student in a school hallway last year, according to authorities. Six board members voted in favor of a resolution reappointing Sanchez, according to a video of the board meeting. Two board members, Nubia DuVall Wilson and Kaitlin Wittleder, ab…