Merge branch 'master' of https://github.com/worklist/hifi
Merge branch 'master' of https://github.com/worklist/hifi
Merge branch 'master' of https://github.com/worklist/hifi
Fix chat scroll bar widget jumping

Hovering over the chat window's scroll bar was causing it to jump
around. Replaced the 12px style spacing that was causing the problem
with a widget-based solution.
Fix chat window scrolling to stay at bottom

Stay at bottom window when:
- There is new chat.
- People come and go from online list.
- Chat window hides and restores when application focus changes.
- Interface is minimized and restored.
Merge pull request #2926 from ctrlaltdavid/chat_window

Fix chat window scrolling
improved playSound.js to work if no spatial controller attached
Merge pull request #2928 from PhilipRosedale/master

Improved playSound.js to work without a spatial controller
Merge branch 'master' of https://github.com/highfidelity/hifi