Student Select Title Doesn't update on prevPage

[Marcamillian]

Symptom

When clicking the student select title to go to the previous page the title isn't updated (e.g. the class isn't removed from the title when moving from lesson to class pages

Steps to Reproduce

• Select a class and a lesson from the studentSelect widget
• Click the studentSelect title to back up to the lesson page
• The title still displays the previously shown lesson

Expected Behaviour

• Be on the record tab.
• Expand the student select box
• Select a class/lesson/student
• click the top title to go "back" a page
• The title now rolls back to the appropriate lesson/class listing in title

Current Behaviour

• When clicking the title to go "back" a page the title doesn't update

[Marcamillian]

Fixed in commit e65820d375d644b4d96d789f4e8ede61fb3630ed

Re-written the studentSelectModel.clearOption() function to loop through subsequent pages in the model and clear options relating to them.