Allow specifying material opacity.
Removed testing code.
fix presentation of checkboxes who default to true
Merge pull request #3433 from birarda/master

fix presentation of checkboxes who default to true
Merge pull request #3430 from ey6es/master

Read and apply material opacity settings.
Merge branch 'master' of https://github.com/highfidelity/hifi into fixRotatedStatic
Revert "flip default for enable filter to be disable filter to work around settings bug"

This reverts commit 2a9d8d923831d733975b02c5dcaf3ce644c86aa1.