Click-and-hold on center point in "Bounding Box Reference Point Widget" crashes omm

[simonrepp]

Steps:

1. Move mouse over center point of the "Bounding Box Reference Point Widget"
2. (Point should now render in yellow)
3. Left click without releasing
4. omm crashes

This is the widget I am refering to, which as I understand it determines which corner of the bounding box is modified with the numerical controls in the Bounding Box Manager (?):