Add thread for opening fits on startup, which allows us of wait dialog

Wait dialog doesn't actually move as the GUI thread is locked when opening the fits, but at least it shows that -something- is happening.

gui/builtinViews/fittingView.py

@@ -49,13 +49,13 @@ class FitSpawner(gui.multiSwitch.TabSpawner):
         for index, page in enumerate(self.multiSwitch.pages):
             try:
                 if page.activeFitID == event.fitID:
-                    count +=1
+                    count += 1
                     self.multiSwitch.SetSelection(index)
                     wx.PostEvent(self.mainFrame, GE.FitChanged(fitID=event.fitID))
                     break
             except:
                 pass
-        if count <0:
+        if count < 0:
             mstate = getattr(event, "mstate", wx.GetMouseState())
 
             if mstate.CmdDown() or mstate.MiddleDown():