Bug 18082 compiler pref page is the only one with icons
the icons are pretty but i think we should remove them for consistency
org.eclipse.jdt.ui/ui/org/eclipse/jdt/internal/ui/preferences/CompilerPreferencePage.java
} else if (widget instanceof Combo) {
			newValue= data.getValue(((Combo)widget).getSelectionIndex());
		} else {
			return;
		}
		fWorkingValues.put(data.getKey(), newValue);
		
		validateSettings(data.getKey(), newValue);
	}
	
	private void textChanged(Text textControl) {
		String key= (String) textControl.getData();
		String number= textControl.getText();
		fWorkingValues.put(key, number);
		validateSettings(key, number);
	}	
	private boolean checkValue(String key, String value) {
		return value.equals(fWorkingValues.get(key));
	}
	/* (non-javadoc)
	 * Update fields and validate.
	 * @param changedKey Key that changed, or null, if all changed.
	 */	
	private void validateSettings(String changedKey, String newValue) {
		if (changedKey != null) {
			if (INTR_DEFAULT_COMPLIANCE.equals(changedKey)) {
				updateComplianceEnableState();
				if (DEFAULT.equals(newValue)) {
					updateComplianceDefaultSettings();
				}