Fix SQL injection threats and replace SESSION variable with api_get_user_id - refs #7272
If user has only one option to choose from buy courses menu, redirect it there - refs #7272
Fix. Replace a pair of id_user with user_id - refs #7272
Add manageTab function to plugin main class - refs #7272
Conflict solved when merging - refs #7272
Minor - Remove a useless commented line - refs #7272
Add comments. Fix french translation. Change redirection process to a much cleaner one. - refs #7272
Merge branch '1.9.x' into 7272
Merge pull request #398 from ilosada/7272

7272