Bug 51853 Support new compiler option PREF_PB_UNUSED_DECLARED_THROWN_EXCEPTION_WHEN_OVERRIDING
20040212 Add the new setting to the compiler preference page
org.eclipse.jdt.ui/ui/org/eclipse/jdt/internal/ui/preferences/CompilerConfigurationBlock.java
COMPILER_PB_MISSING_JAVADOC_COMMENTS_VISIBILITY: "public", "protected", "default", "private"
			  COMPILER_PB_MISSING_JAVADOC_COMMENTS_OVERRIDING: "enabled", "disabled"
		 */
		
		
		
		GridLayout layout = new GridLayout();
		layout.numColumns= nColumns;
		
		Composite composite= new Composite(folder, SWT.NULL);
		composite.setLayout(layout);
		
		Label description= new Label(composite, SWT.WRAP);
		description.setText(PreferencesMessages.getString("CompilerConfigurationBlock.javadoc.description")); 
		GridData gd= new GridData();
		gd.horizontalSpan= nColumns;
		gd.widthHint= fPixelConverter.convertWidthInCharsToPixels(50);
		description.setLayoutData(gd);
			
		int indent= fPixelConverter.convertWidthInCharsToPixels(2);
		
		String label = PreferencesMessages.getString("CompilerConfigurationBlock.pb_missing_comments.label"); 
		addComboBox(composite, label, PREF_PB_MISSING_JAVADOC_COMMENTS, errorWarningIgnore, errorWarningIgnoreLabels, 0);
		label = PreferencesMessages.getString("CompilerConfigurationBlock.pb_missing_comments_visibility.label"); 
		addComboBox(composite, label, PREF_PB_MISSING_JAVADOC_COMMENTS_VISIBILITY, visibilities, visibilitiesLabels, indent);
		
		label= PreferencesMessages.getString("CompilerConfigurationBlock.pb_missing_comments_overriding.label"); 
		addCheckBox(composite, label, PREF_PB_MISSING_JAVADOC_COMMENTS_OVERRIDING, enabledDisabled, indent);
		
		Label separator= new Label(composite, SWT.HORIZONTAL);