Fixed smtk app test failing as a result from migrating from Qt4 to Qt5. See...

Fixed smtk app test failing as a result from migrating from Qt4 to Qt5. See ticket for more details. Fixes #4058.

git-svn-id: http://subversion.wr.usgs.gov/repos/prog/isis3/branches/ipce@7167 41f8697f-d340-4b68-9986-7bafba869bb8