Skip autosave prompt when vistrail is already open
Skip autosave prompt when vistrail is already open

gui/vistrails_window.py:
- QVistrailsWindow.getViewFromLocator: *new
  Used to check when to skip autosave prompt

Bugfix: Autosave prompts when vistrail is already open

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