Bug 25827 Disposing of MemberFilterActionGroup
Build 2.0.2 and 2.1 When investigating an editor memory leak PR we found out that this group has a dispose method which is never called. When we then called from the editor it throw an exeption (viewer was disposed). Don't know if the group really needs dispose() if so it should get called.
org.eclipse.jdt.ui/ui/org/eclipse/jdt/ui/actions/MemberFilterActionGroup.java
fViewer.addFilter(fFilter);
	}
	
	private String getPreferenceKey(int filterProperty) {
		return "MemberFilterActionGroup." + fViewerId + '.' + String.valueOf(filterProperty); 
	}
	
	/**
	 * Sets the member filters.
	 * 
	 * @param filterProperty the filter to be manipulated. Valid values are <code>FILTER_FIELDS</code>, 
	 * <code>FILTER_PUBLIC</code>, and <code>FILTER_PRIVATE</code> as defined by this action 
	 * group
	 * @param set if <code>true</code> the given filter is installed. If <code>false</code> the
	 * given filter is removed
	 * .
	 */	
	public void setMemberFilter(int filterProperty, boolean set) {
		setMemberFilters(new int[] {filterProperty}, new boolean[] {set}, true);
	}
	private void setMemberFilters(int[] propertyKeys, boolean[] propertyValues, boolean refresh) {
		if (propertyKeys.length == 0)
			return;
		Assert.isTrue(propertyKeys.length == propertyValues.length);
		
		for (int i= 0; i < propertyKeys.length; i++) {
			int filterProperty= propertyKeys[i];
			boolean set= propertyValues[i];
			if (set) {