Fix the chat widget's visibility when not logged in
Show OS notification when user is not logged in
Remove unnecessory header file inclusion in Menu.cpp
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
separate style handling for chat area and its context menu.
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.
more correct detection of floor surfaces
Merge upstream/master into andrew/inertia
Merge pull request #2925 from talentraspel/19706

separate style handling for chat area and its context menu.
Merge pull request #2927 from AndrewMeadows/inertia

Improved detection of floor surfaces
Merge pull request #2926 from ctrlaltdavid/chat_window

Fix chat window scrolling
improved playSound.js to work if no spatial controller attached
Some tricks to avoid shadow artifacts: render back faces to shadow buffer,
use polygon offset.
Merge pull request #2928 from PhilipRosedale/master

Improved playSound.js to work without a spatial controller
Merge branch master from upstream
Provide option to disable avatar shadowing.
Merge branch 'master' of https://github.com/highfidelity/hifi