Bug 221521 [Markers] New markers API needs to be pared down
We have too much API in some of the new classes and they can be moved to internals
bundles/org.eclipse.ui.ide/src/org/eclipse/ui/views/markers/MarkerField.java
public String getColumnTooltipText() {
		return getColumnHeaderText();
	}
	/**
	 * Get the number of characters that should be reserved for the receiver.
	 * 
	 * @param control
	 *            the control to scale from
	 * @return int
	 */
	public int getDefaultColumnWidth(Control control) {
		return 15 * getFontWidth(control);
	}
	/**
	 * Return the editing support for entries for this field. Return null if it
	 * cannot be in-line edited.
	 * 
	 * @param viewer
	 *            the viewer this will be applied to
	 * @return {@link EditingSupport} or <code>null</code>.
	 */
	public EditingSupport getEditingSupport(ColumnViewer viewer) {
		return null;
	}
	/**
	 * Determine the average width of font used by the control.
	 * 
	 * @param control
	 * @return int
	 */