Merge pull request #3014 from Barnold1953/master

Sixense Mouse Input
Experimenting with ambidextrous sixense mouse input
Invert hydra move view and thrust controllers to match consoles
Merge branch 'master' of https://github.com/highfidelity/hifi
Store the last mouse move input type for application overlay
Support for multiple oculus overlay magnifiers
Removed left handed menu option
Made applicationoverlay more readable
Fix for click and drag with sixense