Added checks to
if( m_dfControls.m_filter1Model.isValueChanged() || m_filter1changed )
if( m_dfControls.m_filter2Model.isValueChanged() || m_filter2changed )

so the filter types get initilized
Merge pull request #1369 from curlymorphic/issue1347

Issue 1347 Dual filter not loaded properly? rebased to stable-1.1