Fixed normal bug EXT-2616 ("Speak" button isn't narrowed and has title when...

Fixed normal bug EXT-2616 ("Speak" button isn't narrowed and has title when width of window is 800px)
- updated resize behavior to shrink Snapshot button: only speaker is shown in this case.
- updated LLSpeakButton to hide/show its labels
- updated talk_button widget (talk_button.xml) to have correct follows attributes
- also fixed bug with calculating necessary updates for children while extending bottom tray

--HG--
branch : product-engine