Bug 294790 [KeyBindings] LegacyActionTools should support SWT.F13 - F20
bundles/org.eclipse.jface/src/org/eclipse/jface/action/LegacyActionTools.java
*/
	public static final int convertAccelerator(final String acceleratorText) {
		int accelerator = 0;
		StringTokenizer stok = new StringTokenizer(acceleratorText, "+"); 
		int keyCode = -1;
		boolean hasMoreTokens = stok.hasMoreTokens();
		while (hasMoreTokens) {
			String token = stok.nextToken();
			hasMoreTokens = stok.hasMoreTokens();
			
			
			if (hasMoreTokens) {
				int modifier = findModifier(token);
				if (modifier != 0) {
					accelerator |= modifier;
				} else { 
					return 0;
				}
			} else {
				keyCode = findKeyCode(token);
			}
		}
		if (keyCode != -1) {
			accelerator |= keyCode;
		}
		return accelerator;
	}
	/**
	 * Parses the given accelerator text, and converts it to an accelerator key
	 * code.