Changes the Modal Height when used for OpenAssessment Editing

Corrects the Modal height for OpenAsessment Editors only.  Note we also add in the functionality to easily change this at any point in time using the full_height tag.  Also I stopped using !important because I have grown up from four weeks ago.


This is compensating for three things, the height of the buttons div, the height of the tabs div, and the border (1px each side) of the editing area.  Because all three of these things have fixed heights (the first two set by studio), we want this editor to take up 100% of the extra room. 97px is the golden number that is taken up by other things.