Virtual Console: when going to operate mode, grab the focus to allow key combinations to work

Renamed VCFrame "disable" feature XML tags
Fixed VC Frame unit test
Plugins/DMXUSB: disabled FTDI serial extraction code
Allow to build with disabled debug on Windows
Webaccess: updated mongoose code to the latest upstream version

Webaccess: added a few more translatable strings
Plugins/DMXUSB: correctly set FTDI id, fundamental in Windows