Fixing #230; add a scrollbar to the PM popup dialog if necessary. This wasn't as easy as I thought. Had to wrap the PM text in a div with its styling (max-height and overflow). If I then resized the dialog, I'd get two scrollbars. So for now, made the dialog non-resizable.

#frmbody {
	padding: 10px;
	background-color: #FFF;
	border: 1px solid #CCC;
}

.frmRow {
	margin-bottom: 10px;
}

#templatesrc {
	border: none;
	width: 320px;
	height: 240px;
}

.title {
	padding-bottom: 5px;
}

.mceActionPanel {
	padding-top: 5px;
}