BF: Fix tab traversal on param controls

Author: Todd OST

psychopy/app/builder/dialogs/paramCtrls.py

@@ -143,7 +143,7 @@ def tunnelShow(self, sizer, visible):
 class SingleLineCtrl(wx.TextCtrl, _ValidatorMixin, _HideMixin):
     def __init__(self, parent, valType,
                  val="", fieldName="",
-                 size=wx.Size(-1, 24), style=wx.DEFAULT):
+                 size=wx.Size(-1, 24), style=wx.TE_LEFT):
         # Create self
         wx.TextCtrl.__init__(self)
         self.Create(parent, -1, val, name=fieldName, size=size, style=style)