Bug 123404 Pre-define style shouldn't be listed in the style list
Description: Pre-define style shouldn't be listed in the style list Steps to reproduce: 1.Add a label 2.New a pre-define style named "label", set font color to red 3.New a text, select it Expected result: The pre-define style can't apply to the text through any way Actual result: In property editor or properties sheet, the style list lists the pre-define style, and it can be applied to the text Note: In context menu, pre-define style is invisible for the text
UI/org.eclipse.birt.report.designer.ui.lib.explorer/src/org/eclipse/birt/report/designer/ui/lib/explorer/LibraryExplorerTreeViewPage.java
return ( ctrl == null || ctrl.isDisposed( ) );
	}
	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.birt.report.model.api.validators.IValidationListener#elementValidated(org.eclipse.birt.report.model.api.DesignElementHandle,
	 *      org.eclipse.birt.report.model.api.validators.ValidationEvent)
	 */
	public void elementValidated( DesignElementHandle targetElement,
			ValidationEvent ev )
	{
		treeViewer.refresh( );
	}
	private void refreshRoot( )
	{
		treeViewer.setInput( libraryProvider.getLibraries( ) );
	}
	public void setLibraryProvider( ILibraryProvider provider )
	{
		this.libraryProvider = provider;
	}
	private void addListener( Object input )
	{
		if ( input instanceof Object[] )
		{
			Object[] libs = (Object[]) input;
			for ( int i = 0; i < libs.length; i++ )
			{
				if ( libs[i] instanceof LibraryHandle )
				{