Update 'js/visualUI/functions.js'

Defined constant to points iVProg manual: const URLHELP = 'https://www.usp.br/line/ivprog/manual_pt/index.html'; //TODO: need to get the current lang and point to the associated language manual
Improved code to load comments in IVPH code (using "Portugol" sintax). But is missing the context. //TODO load in correct context; load comment before "main function".