Added progress view to chat translation layout
Created a test for clearing chat list
Chat list gets cleared when initialized
HttpChatTranslation does not call initWithMessages() anymore
Removed initWithMessages() from codebase
ChatProgressController and its tests
ErrorListener renamed to ProgressListener
Introduced ProgressListener.onConnected()
Invoke ProgressListener.onConnected() from HttpChatTranslation
Animate progress indicator show/hide
Animating listview show/hide
TODO updated
chat_translation layout tweaks