[bug] Missing escape for filterInput RegExp (v3.0.9)

[Cyrille37]

Hi,

You're missing user input escaping before construct the RegExp. Actually if you input a ')' in filter input it throws a SyntaxError: Invalid regular expression: /abc)/: Unmatched ')'

    var filterInput = $.trim(dualListbox.elements['filterInput'+selectIndex].val());
    filterInput = filterInput.replace(/[.*+?^${}()|[\]\\]/g, '\\$&');
    var regex = new RegExp(filterInput, 'gi')

Cheers