Change Details

Steps to reproduce: 1) Open a page containing a maths formula. 2) Select the formula and click 'Edit' in the context menu. Change the formula (alternatively, switch to inline or block display). 3) Decide that you made a mistake. Click 'Cancel'. Result: Your changes are preserved anyway. Pressing 'Cancel' appears to be functionally identical to pressing 'Done'. Expected outcome: Your changes would actually be cancelled. (What exactly is the Cancel button supposed to do, if not cancel your changes?)