fix issue, then it wasn't possible to view FBD programs

the reason for that is possible wx-3.0-gtk2 bug that happens if
ALWAYS_SHOW_SB is set.

Traceback (most recent call last):
File "Beremiz.py", line 1045, in OnProjectTreeItemActivated
IDEFrame.OnProjectTreeItemActivated(self, event)
File "IDEFrame.py", line 1667, in OnProjectTreeItemActivated
self.EditProjectElement(item_infos["type"], item_infos["tagname"])
File "IDEFrame.py", line 1752, in EditProjectElement
new_window = Viewer(self.TabsOpened, tagname, self, self.Controler)
File "editors/Viewer.py", line 611, in __init__
EditorPanel.__init__(self, parent, tagname, window, controler, debug)
File "editors/EditorPanel.py", line 68, in __init__
self._init_ctrls(parent)
File "editors/EditorPanel.py", line 52, in _init_ctrls
self._init_Editor(self)
File "editors/Viewer.py", line 603, in _init_Editor
style=wx.HSCROLL | wx.VSCROLL | wx.ALWAYS_SHOW_SB)
File "/usr/lib/python2.7/dist-packages/wx-3.0-gtk2/wx/_windows.py", line 296, in __init__
_windows_.ScrolledWindow_swiginit(self,_windows_.new_ScrolledWindow(*args, **kwargs))
PyAssertionError: C++ assertion "scrolled" failed at ../src/gtk/scrolwin.cpp(205) in DoShowScrollbars(): window must be created

{
   "controller": {
   },
   "workers": [
      {
         "type": "router",
         "options": {
            "pythonpath": [".."]
         },
         "realms": [
            {
               "name": "Automation",
               "roles": [
                  {
                     "name": "anonymous",
                     "permissions": [
                        {
                           "uri": "*",
                           "publish": true,
                           "subscribe": true,
                           "call": true,
                           "register": true
                        }
                     ]
                  }
               ]
            }
         ],
         "transports": [
            {
               "type": "websocket",
               "endpoint": {
                  "type": "tcp",
                  "port": 8888
               },
               "url": "ws://127.0.0.1:8888/",
               "serializers" : ["msgpack"]
            }
         ]
      }
   ]
}