FLUID-5355: browser alert for TTS error

Added a browser alert to be displayed on errors generated from the Buzz library while attempting to use the TTS.
FLUID-5349: Adding a note to the overviewPanel

Added a note in the instructions to indicate that "text-to-speech" and "simplify" are not actually part of the preferences framework.
Merge branch 'master' into FLUID-5349
FLUID-5349: Moved note to description.

Also made it emphasized.
Merge branch 'master' into FLUID-5355
Merge remote-tracking branch 'justin/FLUID-5355'

* justin/FLUID-5355:
  FLUID-5355: browser alert for TTS error