Bug 120218 Right click menu option to apply theme.
We should support the following right click menu. -- User right clicks int he report design layout area. -- The following menu items needs to be supported Theme --> Apply Theme -->Theme1 -->Theme2 ( similar to Apply style menu option )
UI/org.eclipse.birt.report.designer.core/src/org/eclipse/birt/report/designer/util/DEUtil.java
if ( handle instanceof GroupHandle )
			{
				handle = handle.getContainer( );
			}
		}
		Object fontSizeValue = getModelFontSize( handle );
		if ( fontSizeValue instanceof DimensionValue )
		{
			int parentSize = getFontSizeIntValue( handle.getContainer( ) );
			int size = (int) CSSUtil.convertToPoint( fontSizeValue, parentSize ) - 1;
			size = ( size < 1 ) ? 1 : size;
			DimensionValue dm = new DimensionValue( size, "pt" ); 
			return dm.toString( );
		}
		else if ( fontSizeValue instanceof String )
		{
			String fontSize = (String) fontSizeValue;
			if ( fontSize.equals( DesignChoiceConstants.FONT_SIZE_LARGER ) )
			{
				return getLargerFontSize( handle.getContainer( ) );
			}
			else if ( fontSize.equals( DesignChoiceConstants.FONT_SIZE_SMALLER ) )
			{
				return getSmallerFontSize( handle.getContainer( ) );
			}
			else
			{
				for ( int i = DesignerConstants.fontSizes.length - 1; i > 0; i-- )
				{
					if ( fontSize.equals( DesignerConstants.fontSizes[i][0] ) )