SVGHMI: In order to allow widget signature and description to coexist in same ysl2 file, introduced widget_class, widget_defs to declare widget codegen templates and gen_index_xhtml to mark templates that are only usefull in gen_index_xhtml.xslt.
#State Text Reference;;;;;;;#Reference Number;Text 1;Text 2;Text 3;Text 4;Text 5;...;Text n