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
* @see org.eclipse.jface.viewers.EditingSupport#getValue(java.lang.Object)
		 */
		protected Object getValue(Object element) {
			return new Boolean(((MarkerEntry) element).getAttributeValue(IMarker.DONE,
					false));
		}
		/*
		 * (non-Javadoc)
		 * 
		 * @see org.eclipse.jface.viewers.EditingSupport#setValue(java.lang.Object,
		 *      java.lang.Object)
		 */
		protected void setValue(Object element, Object value) {
			MarkerEntry entry = (MarkerEntry) element;
			Boolean booleanValue = (Boolean) value; 
			try {
				entry.getMarker().setAttribute(IMarker.DONE, booleanValue.booleanValue());
			} catch (CoreException e) {
				MarkerSupportInternalUtilities.handle(e);
			}
		}
	}
	/**
	 * Create a new instance of the receiver.
	 */
	public MarkerCompletionField() {
		super();
	}
	/*
	 * (non-Javadoc)