[Bugfix:TAGrading] annotated pdf feedback alignment (#5771)
[Bugfix:TAGrading] annotated pdf feedback alignment (#5771)

* fixed alignment

* case with no annotated files

Co-authored-by: Barb Cutler <b4fc851c82a06ed3e5f5c72e00b8d2b8b8ad995c@users.noreply.github.com>
Submitty/Submitty,RCOS-Grading-Server/HWserver,Submitty/Submitty,Submitty/Submitty,Submitty/Submitty,Submitty/Submitty,RCOS-Grading-Server/HWserver,RCOS-Grading-Server/HWserver,RCOS-Grading-Server/HWserver,Submitty/Submitty,RCOS-Grading-Server/HWserver,Submitty/Submitty,RCOS-Grading-Server/HWserver,Submitty/Submitty,RCOS-Grading-Server/HWserver,RCOS-Grading-Server/HWserver,Submitty/Submitty,RCOS-Grading-Server/HWserver