Bug 219483 [Markers] MarkerField needs to support font and colours
Some users want to be able to set the font and colour of an entry in the markers view. We should pass in a ViewerCell for this.
bundles/org.eclipse.ui.ide/src/org/eclipse/ui/views/markers/MarkerField.java
/**
	 * Get the severity of the element.
	 * 
	 * @param element
	 * @return int
	 * @see IMarker#SEVERITY_ERROR
	 * @see IMarker#SEVERITY_WARNING
	 * @see IMarker#SEVERITY_INFO
	 */
	public final int getSeverity(MarkerItem element) {
		if (element.isConcrete())
			return element.getAttributeValue(IMarker.SEVERITY, -1);
		return 0;
	}
	/**
	 * @param item
	 * @return The String value of the object for this particular field to be
	 *         displayed to the user.
	 */
	public abstract String getValue(MarkerItem item);
	/**
	 * Set the configuration element used by the receiver.
	 * 
	 * @param element
	 */
	public final void setConfigurationElement(IConfigurationElement element) {
		configurationElement = element;
	}
}