Bug 31249 Bad default modifier for Hyperlink style navigation on MacOS X
M5 The default modifier for hyperlink style navigation is "Control" which doesn't work well on MacOS X because here the Control modifier is used to simulate a right-click (opening the context menu). The consequence of this is that if control is pressed the users gets the underlined text style when hovering, but he cannot follow the link because a click results in opening the context menu. The default on MacOS should be 'Command'
org.eclipse.jdt.ui/ui/org/eclipse/jdt/ui/PreferenceConstants.java
* A string value used by the named preference <code>REFACTOR_ERROR_PAGE_SEVERITY_THRESHOLD</code>.
	 * 
	 * @see #REFACTOR_ERROR_PAGE_SEVERITY_THRESHOLD
	 */
	public static final String REFACTOR_WARNING_SEVERITY= "2"; 
	/**
	 * A string value used by the named preference <code>REFACTOR_ERROR_PAGE_SEVERITY_THRESHOLD</code>.
	 * 
	 * @see #REFACTOR_ERROR_PAGE_SEVERITY_THRESHOLD
	 */
	public static final String REFACTOR_INFO_SEVERITY= "1"; 
	/**
	 * A string value used by the named preference <code>REFACTOR_ERROR_PAGE_SEVERITY_THRESHOLD</code>.
	 * 
	 * @see #REFACTOR_ERROR_PAGE_SEVERITY_THRESHOLD
	 */
	public static final String REFACTOR_OK_SEVERITY= "0"; 
	/**
	 * A named preference thet controls whether all dirty editors are automatically saved before a refactoring is
	 * executed.
	 * <p>
	 * Value is of type <code>Boolean</code>.
	 * </p>
	 */
	public static final String REFACTOR_SAVE_ALL_EDITORS= "Refactoring.savealleditors"; 
	/**
	 * A named preference that controls if the Java Browsing views are linked to the active editor.
	 * <p>
	 * Value is of type <code>Boolean</code>.
	 * </p>