update _icon call arg (#2755)

Co-authored-by: divaajainn <divyaa.jainn29@gmail.com>

Author: divyaajainn

mslib/msui/mpl_qtwidget.py

@@ -977,7 +977,7 @@ def _icon(self, name, *args):
         if os.path.exists(myname):
             return QtGui.QIcon(myname)
         else:
-            return super()._icon(name, *args)
+            return super()._icon(name)
 
     def _zoom_pan_handler(self, event):
         """