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/internal/views/markers/MarkerCompletionField.java
private Image getCompleteImage() {
		return MarkerSupportInternalUtilities.createImage(COMPLETE_IMAGE_PATH);
	}
	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.ui.internal.provisional.views.markers.api.MarkerField#getColumnTooltipText()
	 */
	public String getColumnTooltipText() {
		return MarkerMessages.completion_description;
	}
	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.ui.internal.provisional.views.markers.api.MarkerField#compare(org.eclipse.ui.internal.provisional.views.markers.api.MarkerItem,
	 *      org.eclipse.ui.internal.provisional.views.markers.api.MarkerItem)
	 */
	public int compare(MarkerItem item1, MarkerItem item2) {
		return getDoneConstant(item2) - getDoneConstant(item1);
	}
	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.ui.internal.provisional.views.markers.api.MarkerField#getEditingSupport(org.eclipse.jface.viewers.ColumnViewer)
	 */
	public EditingSupport getEditingSupport(ColumnViewer viewer) {
		return new CompletionEditingSupport(viewer);
	}
}