SVGHMI: SVG viewport now defined so that HMI take scales and fit to the view. Implemented page switch through viewport change, no hiding of widget for now.
<?xml version='1.0' encoding='utf-8'?>
<BeremizRoot URI_location="LOCAL://">
<TargetType/>
<Libraries Enable_SVGUI_Library="true" Enable_Python_Library="true"/>
</BeremizRoot>