the iframe#wysiwygTextarea_ifr needs min-height set

On wiki/pages/editpage.action of our on demand instance, the element iframe#wysiwygTextarea_ifr does not fill the parent div#wysiwyg. It takes up the top 25% which results in a truncation of the display and the majority of screen being taken up by and empty text box that cannot be filled.

It is fixed by adding a min-height: 100% to the iframe.

Affects Google Chrome 27.0.1425.0 on Linux.