Bug 137315 [Dialogs] Doubleclickable area to restore dialog size is often very small
bundles/org.eclipse.jface/src/org/eclipse/jface/dialogs/Dialog.java
if (controlFontData[i].equals(defaultFontData[i])) {
					continue;
				}
				return false;
			}
			return true;
		}
		return false;
	}
	/**
	 * Get the default font for this type of control.
	 * 
	 * @param control
	 * @return the default font
	 */
	private static Font getDefaultFont(Control control) {
		String fontName = "DEFAULT_FONT_" + control.getClass().getName(); 
		if (JFaceResources.getFontRegistry().hasValueFor(fontName)) {
			return JFaceResources.getFontRegistry().get(fontName);
		}
		Font cached = control.getFont();
		control.setFont(null);
		Font defaultFont = control.getFont();
		control.setFont(cached);
		JFaceResources.getFontRegistry().put(fontName,
				defaultFont.getFontData());
		return defaultFont;
	}
	/**
	 * Return whether or not the dialog font is currently the same as the