`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 Borland bcc32
@REM type bmake, and wait...
@REM do not edit - automatically generated from ProjectDefinition
@REM -------
@SET DEFINES=
@REM Kludge got Mercurial, cannot be implemented in Borland make
@FOR /F "tokens=*" %%i in ('hg root') do SET HGROOT=%%i
@IF "%HGROOT%" NEQ "" SET DEFINES=%DEFINES% "-DHGROOT=%HGROOT%"
make.exe -N -f bc.mak %DEFINES% %*