Bug 181365 There is no icon in the background image of MasterPage property editor
Description: In the property editor of Masterpage, go to advanced tab. Click Background node to set the "background image", but there is no icon to invoke the image resources in the local machine. In style builder, there is a "Browse.." button to set the background image. That will be more convient for user to set background image.
UI/org.eclipse.birt.report.designer.ui.views/src/org/eclipse/birt/report/designer/internal/ui/views/attributes/provider/GroupPropertyHandleProvider.java
}
	/**
	 * Determines whether this is a color type property.
	 * 
	 * @param o
	 *            the property model to inspect
	 * @return true if a color type property
	 */
	public boolean isColorProperty( Object o )
	{
		if ( o instanceof GroupPropertyHandle )
		{
			return ( (GroupPropertyHandle) o ).getPropertyDefn( ).getTypeCode( ) == IPropertyType.COLOR_TYPE;
		}
		return false;
	}
	/**
	 * Determines whether this is a dimension property.
	 * 
	 * @param o
	 *            the property model to inspect
	 * @return true if a dimension property
	 */
	public boolean isFontSizeProperty( Object o )
	{
		if ( o instanceof GroupPropertyHandle )
		{
			if ( !( (GroupPropertyHandle) o ).getPropertyDefn( ).hasChoices( ) )
			{
				return false;