<ticket>#476</ticket>
<ticket>#476</ticket>

This fixes the problem where default values were not being
used in sliders nor in numeric steppers in mashups.

--

gui/mashups/mashups_widgets.py
  class QAliasSliderWidget:
     __init__()
         making sure to use the default value as the current value of the widget

  class QAliasNumericStepperWidget:
     __init__()
          making sure to use the default value as the current value of the widget

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