Bug 32893 Workspace Compatibility Problems 2.0 -> 2.1
Build 2.1 RC1 This PR collects problems related to opening a 2.0 workspace with 2.1.
org.eclipse.jdt.ui/ui/org/eclipse/jdt/ui/PreferenceConstants.java
* A named preference that defines the hover shown when no control key is
	 * pressed.
	 *
	 * @see JavaUI
	 * @since 2.1
	 */
	public static final String EDITOR_TEXT_HOVER_MODIFIERS= "hoverModifiers"; 
	/**
	 * A named preference that controls whether bracket matching highlighting is turned on or off.
	 * <p>
	 * Value is of type <code>Boolean</code>.
	 * </p>
	 */
	public final static String EDITOR_MATCHING_BRACKETS= "matchingBrackets"; 
	/**
	 * A named preference that holds the color used to highlight matching brackets.
	 * <p>
	 * Value is of type <code>String</code>. A RGB color value encoded as a string 
	 * using class <code>PreferenceConverter</code>
	 * </p>
	 * 
	 * @see org.eclipse.jface.resource.StringConverter
	 * @see org.eclipse.jface.preference.PreferenceConverter
	 */
	public final static String EDITOR_MATCHING_BRACKETS_COLOR=  "matchingBracketsColor"; 
	/**
	 * A named preference that controls whether the current line highlighting is turned on or off.
	 * <p>
	 * Value is of type <code>Boolean</code>.
	 * </p>