linking to submission task
add facebook acc
optimize linking to submission
published achievement task
Revert "optimize linking to submission"

This reverts commit 3d3ddba1ed29cbd9086b10523cd8534e7ee14589.
Revert "Revert "optimize linking to submission""

This reverts commit 8fff62a17c086d870f03909b589af8b53c71757f.
Revert "published achievement task"

This reverts commit 676fc0b6b1f681e5b9b010e8f75b5ef8303cbdd1.
Revert "Revert "published achievement task""

This reverts commit 780503e72d30521a863e69a623a17a7ab7521ec6.
optimize code, show indicator in achievements list
sidebar task
update sidebar task
improve sidebar task
additional improvement for sidebar task

validation for empty name, drag drop pos, separated display student
level and achievement
abc
Revert "grading show for student"

This reverts commit 285de955c1fb152aed9d1989c7166c4c78811232.