GPII-722: Fixing problem with blank sentences.

http://issues.gpii.net/browse/GPII-722
I see that you are showing the messageLineLabel here, but do you need an accompanying hide action? It seems that you are only hiding it "onReady" on line 162. Do you also need to hide it "onLogout". If you look at line 89 you can see that the text is cleared onLogout.