Bug 53888 Mnemonic collision Text Editor -> Quick Diff
20040303 The Make Default and Restore Defaults button have the same mnemonic
org.eclipse.jdt.ui/ui/org/eclipse/jdt/internal/ui/preferences/JavaEditorPreferencePage.java
if (fBrowserLikeLinksKeyModifierStatus == null)
		fBrowserLikeLinksKeyModifierStatus= new StatusInfo();
		return fBrowserLikeLinksKeyModifierStatus;
	}
	/**
	 * Computes the state mask for the given modifier string.
	 * 
	 * @param modifiers	the string with the modifiers, separated by '+', '-', ';', ',' or '.'
	 * @return the state mask or -1 if the input is invalid
	 */
	private int computeStateMask(String modifiers) {
		if (modifiers == null)
			return -1;
		
		if (modifiers.length() == 0)
			return SWT.NONE;
		int stateMask= 0;
		StringTokenizer modifierTokenizer= new StringTokenizer(modifiers, ",;.:+-* "); 
		while (modifierTokenizer.hasMoreTokens()) {
			int modifier= EditorUtility.findLocalizedModifier(modifierTokenizer.nextToken());
			if (modifier == 0 || (stateMask & modifier) == modifier)
				return -1;
			stateMask= stateMask | modifier;
		}
		return stateMask;
	}
	/*
	 * @see PreferencePage#createContents(Composite)
	 */
	protected Control createContents(Composite parent) {