Revealing filterable doesn't show any matches if all items match.

[Shepard]

If you have a filterable with data-filter-reveal="true" and perform a search that matches all items, none are shown instead of all.

See my test page: http://jsbin.com/acIRUBo/46/edit
Enter "test" into the text field.
This should show all three items "Test 1", "Test 2" and "Test 3". Instead it shows none of them. If however you type "test 1" it shows "Test 1".

This appears to be caused by the logic in _filterItems in the fitlerable widget, in particular this code:

        // If nothing is hidden, then the decision whether to hide or show the items
        // is based on the "filterReveal" option.
        if ( hide.length === 0 ) {
            filterItems[ opts.filterReveal ? "addClass" : "removeClass" ]( "ui-screen-hidden" );
        } else {
            $( hide ).addClass( "ui-screen-hidden" );
            $( show ).removeClass( "ui-screen-hidden" );
        }

I guess this needs a cleverer check.

Browser: Firefox 28 on Desktop (Windows 7).