fixed font-size set in case of font-family unchanged, code cleanup in Helpers updateFontProperties
fixed font-size set in case of font-family unchanged, code cleanup in
Helpers updateFontProperties

readium/readium-shared-js,NYPL/readium-shared-js,NYPL/readium-shared-js,JoMedia/readium-shared-js,NYPL-Simplified/readium-shared-js,ravn-no/readium-shared-js,ravn-no/readium-shared-js,NYPL-Simplified/readium-shared-js,readium/readium-shared-js,kivuto/readium-shared-js,kivuto/readium-shared-js