defaultSweaveEngine_ = new RnwWeaveSelectWidget();
defaultSweaveEngine_.setValue(
prefs.defaultSweaveEngine().getGlobalValue());
add(defaultSweaveEngine_);
defaultLatexProgram_ = new LatexProgramSelectWidget();
defaultLatexProgram_.setValue(
prefs.defaultLatexProgram().getGlobalValue());
add(defaultLatexProgram_);
Label perProjectLabel = new Label(