set the total of rows dinamically - refs BT#8100
Update parameter quantity of items per page in sessions' table -refs 8285
Merge pull request #39 from DeEvo/8285

Fix bug -refs BT#8285
Fix bug, Add function to make unique filename using session_id -refs BT#8186
Fix bug, delete sql query part -refs BT#8296
Optimize query - refs BT#8296
Apply to INNER JOIN to gain performance - refs BT#8296
Solve merge conflict
Merge pull request #41 from DeEvo/8296

Fix bug  -refs BT#8296
Rename function and show non visible and visible tests - refs BT#8296
Add comments to query - refs BT#8296
Merge pull request #42 from DeEvo/8296

8296
Update getUniqueFilename to use md5 hash -refs BT#8186
Fix to avoid repeated filenames and delete md5 hash -refs BT#8186
Update query to get exercises for report -refs BT#8322
Merge pull request #43 from DeEvo/8322

Fix bug -refs BT#8322
Fix issue deleting user from course-session - refs BT#8227
Minor - Added documentation for unsubscribe on status == 2
optimize function to show report - refs BT#8296
Hide the pdf export button - refs BT#8228