FLUID-4698: setting font-size on html

Modified the textSize enactor to set the font-size on the root element (html) instead of the container (body). This will allow support of rem units. Another change with this was to set the value in px instead of ems. This is necessary since the root element has no parent for which to base it's value on. The unit tests have been updated.
FLUID-4698: fixed whitespace issue
FLLUID-4698: Textsize set on correct html now

Fixed an issue where the text size would always be set on the parent document. This was causing issues with the separated panel which uses an iframe for the controls and has its own enactors. Also made another small modification that ensures the multiplier used is always a legitimate value.
Merge branch 'master' into FLUID-4698
FLUID-4698: Fixing typos for test includes
Merge remote-tracking branch 'justin/FLUID-4698'

* justin/FLUID-4698:
  FLUID-4698: Fixing typos for test includes
  FLLUID-4698: Textsize set on correct html now
  FLUID-4698: fixed whitespace issue
  FLUID-4698: setting font-size on html
Merge branch 'master' into FLUID-5323