Bug 63159 [Progress] Progress dialog "Run in Background" button does not resize with larger font
If you set the dialog font to something large, the "Run in background" button does not correctly resize.
bundles/org.eclipse.jface/src/org/eclipse/jface/dialogs/Dialog.java
private HashMap buttons = new HashMap();
	/**
	 * Font metrics to use for determining pixel sizes.
	 */
	private FontMetrics fontMetrics;
	/**
	 * Number of horizontal dialog units per character, value <code>4</code>.
	 */
	private static final int HORIZONTAL_DIALOG_UNIT_PER_CHAR = 4;
	/**
	 * Number of vertical dialog units per character, value <code>8</code>.
	 */
	private static final int VERTICAL_DIALOG_UNITS_PER_CHAR = 8;
	/**
	 * Returns the number of pixels corresponding to the height of the given
	 * number of characters.
	 * <p>
	 * The required <code>FontMetrics</code> parameter may be created in the
	 * following way: <code>
	 * 	GC gc = new GC(control);
	 *	gc.setFont(control.getFont());
	 *	fontMetrics = gc.getFontMetrics();
	 *	gc.dispose();
	 * </code>
	 * </p>
	 * 
	 * @param fontMetrics
	 *            used in performing the conversion
	 * @param chars
	 *            the number of characters