FLUID-5221: Fixed the IE8 styling issue with table of content checkbox.
FLUID-5298: Opportunistic fix for widespread component failures in Safari caused by "use strict" mode enabled in Fluid.js
FLUID-5298: Another case of string property access
FLUID-5298: Attempted string manipulation in makeMergeStrategy triggered by slow component lookahead gingerness
Merge remote-tracking branch 'antranig/FLUID-5298'

* antranig/FLUID-5298:
  FLUID-5298: Attempted string manipulation in makeMergeStrategy triggered by slow component lookahead gingerness
  FLUID-5298: Another case of string property access
  FLUID-5298: Opportunistic fix for widespread component failures in Safari caused by "use strict" mode enabled in Fluid.js
Merge branch 'master' into FLUID-5221
Merge remote-tracking branch 'cindy/FLUID-5221'

* cindy/FLUID-5221:
  FLUID-5221: Fixed the IE8 styling issue with table of content checkbox.
Merge remote-tracking branch 'upstream/master' into FLUID-5289