Bug 5492 Open in Hierarchy method list is enabled even when nothing is selected
206 1) Ensure no item is selected in the hierachy view's member list 2) Right click - not on an item 3) Open is present and enabled 4) Select Open, nothing happens
org.eclipse.jdt.ui/ui/org/eclipse/jdt/internal/ui/typehierarchy/MethodsViewer.java
* Filters the method list
	 */	
	public void setMemberFilter(int filterProperty, boolean set) {
		if (set) {
			fFilter.addFilter(filterProperty);
		} else {
			fFilter.removeFilter(filterProperty);
		}
		for (int i= 0; i < fFilterActions.length; i++) {
			if (fFilterActions[i].getFilterProperty() == filterProperty) {
				fFilterActions[i].setChecked(set);
			}
		}
		refresh();
	}
	/**
	 * Returns <code>true</code> if the given filter is set.
	 */	
	public boolean hasMemberFilter(int filterProperty) {
		return fFilter.hasFilter(filterProperty);
	}
	
	/**
	 * Saves the state of the filter actions
	 */
	public void saveState(IMemento memento) {
		memento.putString(TAG_HIDEFIELDS, String.valueOf(hasMemberFilter(MethodsViewerFilter.FILTER_FIELDS)));
		memento.putString(TAG_HIDESTATIC, String.valueOf(hasMemberFilter(MethodsViewerFilter.FILTER_STATIC)));
		memento.putString(TAG_HIDENONPUBLIC, String.valueOf(hasMemberFilter(MethodsViewerFilter.FILTER_NONPUBLIC)));
		memento.putString(TAG_SHOWINHERITED, String.valueOf(isShowInheritedMethods()));