UI testing: wait until event queue empties ...when `#do:`ing an user action. This is necessary for widget/tools that pushes more work back onto an even queue (in order to make the system more responsive).

@REM -------
@REM make using lcc compiler
@REM type lccmake, and wait...
@REM do not edit - automatically generated from ProjectDefinition
@REM -------
make.exe -N -f bc.mak -DUSELCC=1 %*