fix problem that it was impossible to edit SFC jump, if it references non-existent SFC step
<?xml version="1.0"?>
<!-- generated by wxGlade 0.6.4 on Thu May 16 13:24:16 2013 -->
<application path="" name="" class="" option="0" language="python" top_window="wxglade_hmi" encoding="UTF-8" use_gettext="0" overwrite="0" use_new_namespace="1" for_version="2.8" is_template="0" indent_amount="4" indent_symbol="space" source_extension=".cpp" header_extension=".h">
<object class="Class_wxglade_hmi" name="wxglade_hmi" base="EditFrame">
<style>wxDEFAULT_FRAME_STYLE</style>
<title>frame_1</title>
<object class="wxStaticBoxSizer" name="sizer_1" base="EditStaticBoxSizer">
<orient>wxVERTICAL</orient>
<label>Wiimote Test</label>
<object class="sizeritem">
<flag>wxEXPAND</flag>
<border>0</border>
<option>0</option>
<object class="wxButton" name="button_1" base="EditButton">
<label>Connect Wiimote</label>
<events>
<handler event="EVT_BUTTON">OnConnectButton</handler>
</events>
</object>
</object>
<object class="sizeritem">
<flag>wxEXPAND</flag>
<border>0</border>
<option>0</option>
<object class="wxButton" name="button_2" base="EditButton">
<label>Disconnect Wiimote</label>
<events>
<handler event="EVT_BUTTON">OnDisconnectButton</handler>
</events>
</object>
</object>
<object class="sizeritem">
<flag>wxEXPAND</flag>
<border>0</border>
<option>0</option>
<object class="wxStaticText" name="label_1" base="EditStaticText">
<attribute>1</attribute>
<label>Status :</label>
</object>
</object>
<object class="sizeritem">
<flag>wxEXPAND</flag>
<border>0</border>
<option>0</option>
<object class="wxStaticText" name="label_2" base="EditStaticText">
<attribute>1</attribute>
<label>no status</label>
</object>
</object>
</object>
</object>
</application>