Move CREST import inside a conditional

gui/mainMenuBar.py

@@ -20,7 +20,6 @@
 import wx
 
 import config
-from service.crest import Crest
 from service.character import Character
 import gui.mainFrame
 import gui.graphFrame
@@ -28,6 +27,7 @@ import gui.globalEvents as GE
 from gui.bitmapLoader import BitmapLoader
 
 if 'wxMac' not in wx.PlatformInfo or ('wxMac' in wx.PlatformInfo and wx.VERSION >= (3, 0)):
+    from service.crest import Crest
     from service.crest import CrestModes