(bug 43876) Return false in onclick handler to prevent page from jumping

Change-Id: I5a0ef8dedbf219199fbcf0676ce1ea03fc65fc3c
(bug 43876) prevent page from jumping when clicking controls in the students table

Change-Id: I53f8712a4afb2d5a455757e4383081b45807b987
Merge "(bug 43876) prevent page from jumping when clicking controls in the students table"
Merge "(bug 43876) Return false in onclick handler to prevent page from jumping"