RearView Tools

- moved to separate class
- new icon/button for restore view
-
click mirror behaviour

- shrink function - restore mirror window view and set forward
fullscreen view
reset view

- reset icon
- resetView signal
fix blinking
Merge pull request #1134 from ZappoMan/multiple_voxel_servers

fix blinking
Merge pull request #1135 from ey6es/ick

Basic IK/pointing based on mouse cursor with new skeleton.
Merge pull request #1131 from stojce/19443

Code Review for Job #19443
Merge branch 'master' of https://github.com/worklist/hifi into ick