fixing the answer grading not showing bug in gradings view
change answer.save to answer.specific.save
add result fields to both answer and coding_answer
Merge pull request #216 from wangqiang1208/bugfixing/auto-grader-output

fixing the answer grading not showing bug in gradings view
fix training tab duplication bug
re-order tab logs
Merge pull request #218 from wangqiang1208/bugfixing/tab-soft-delete

tabs soft delete implementation
Merge pull request #217 from wangqiang1208/bugfixing/course-dup

fix training tab duplication bug