Force use of 2.8 on ssystems with multiple wx versions installed

Pyfa was reported to break under 2.9

pyfa.py

@@ -34,6 +34,11 @@ if not hasattr(sys, 'frozen'):
         print "Cannot find wxPython or the installed wxPython version doesn't meet the min. requirements.\nYou can download wxPython (2.8) from http://www.wxpython.org/"
         sys.exit(1)
 
+    try:
+        wxversion.select('2.8')
+    except wxversion.VersionError:
+        print("Unable to select wxpython 2.8, attempting to continue anyway")
+
     try:
         import sqlalchemy