FLUID-5198: Renamed "enactors" in "fluid.prefs.enactors" to "enactor".
Merge remote-tracking branch 'cindy/FLUID-5198'

* cindy/FLUID-5198:
  FLUID-5198: Renamed "enactors" in "fluid.prefs.enactors" to "enactor".
Merge remote-tracking branch 'upstream/master' into FLUID-5199