Added special file dialog handling for PyQt5
Added special file dialog handling for PyQt5

Cadair/ginga,rajul/ginga,pllim/ginga,rajul/ginga,naojsoft/ginga,rupak0577/ginga,Cadair/ginga,pllim/ginga,naojsoft/ginga,stscieisenhamer/ginga,pllim/ginga,ejeschke/ginga,naojsoft/ginga,rajul/ginga,ejeschke/ginga,rupak0577/ginga,rupak0577/ginga,Cadair/ginga,ejeschke/ginga,stscieisenhamer/ginga,stscieisenhamer/ginga