wxNviz: import wx.FoldPanelBar for older version wxPython

git-svn-id: https://svn.osgeo.org/grass/grass/trunk@46527 15284696-431f-4ddb-bdfa-cd5b030d7da7

gui/wxpython/gui_modules/nviz_tools.py

@@ -35,8 +35,11 @@ except ImportError:
 try:
     from agw import foldpanelbar as fpb
 except ImportError: # if it's not there locally, try the wxPython lib.
-    import wx.lib.agw.foldpanelbar as fpb
-
+    try:
+        import wx.lib.agw.foldpanelbar as fpb
+    except:
+        import wx.lib.foldpanelbar as fpb # versions <=2.5.5.1
+        
 import grass.script as grass
 
 import globalvar