Replace 2D and 3D text overlay textWidth() method with textSize()
Update scripts to use new textSize() method
Update some comments to reflect changes
Merge branch 'master' into 20226
Merge pull request #3954 from ctrlaltdavid/20226

CR for Job #20226 - Change Overlays.getTextWidth into Overlays.getTextSize
Merge branch 'master' of https://github.com/highfidelity/hifi