<bugfix>Fixed visibility of a connected port in ports panel</bugfix> <ticket>#621</ticket>
<bugfix>Fixed visibility of a connected port in ports panel</bugfix>
<ticket>#621</ticket>

gui/pipeline_view.py:
  - QGraphicsModuleItem.getPortPosition: pass visible_ports set to be modified and set it when creating optional ports
  - QGraphicsModuleItem.getInputPortPosition: pass visible_input_ports
  - QGraphicsModuleItem.getOutputPortPosition: pass visible_output_ports

celiafish/VisTrails,Nikea/VisTrails,Nikea/VisTrails,VisTrails/VisTrails,VisTrails/VisTrails,celiafish/VisTrails,minesense/VisTrails,hjanime/VisTrails,minesense/VisTrails,VisTrails/VisTrails,celiafish/VisTrails,Nikea/VisTrails,hjanime/VisTrails,hjanime/VisTrails,VisTrails/VisTrails,minesense/VisTrails,celiafish/VisTrails,VisTrails/VisTrails,hjanime/VisTrails,hjanime/VisTrails,minesense/VisTrails,minesense/VisTrails,Nikea/VisTrails