`NewSystemBrowser`: avoid updating package info when changed class is not selected This speeds up loading of packages when browser is open as it does not (needlessly) update package info which may involve scm round-trip.

@REM -------
@REM make using tcc compiler
@REM type tccmake, and wait...
@REM do not edit - automatically generated from ProjectDefinition
@REM -------
make.exe -N -f bc.mak USETCC=1 %1 %2