QTreeView calculates row height which ignores columns outside the scrollview

Steps to reproduce:

1. Download and run the attached QtCreator project.
2. Watch the attached movie.

The symptom is that if the first column is visible in the widget when the table is reloaded, then the size of the entire row will include the size of the icon. When the first column is scrolled off the widget and the table is reloaded, the size of the column will be too short to contain the icon.