Fix drag hint collapsing to a single point

Summary:
When using an orderer, if the height was set to "Automatic", the outline
for an item would collapse to a point.

This commit causes it to be the same size as when the height is set to
"Normal".

Test Plan:
* load test.html
* add an orderer
* set the height to "Automatic"
* make sure the outline in the landing area does not shrink to a point

Reviewers: alex

Reviewed By: alex

CC: alpert

Differential Revision: http://phabricator.khanacademy.org/D5836