Atom Tab Bar should scroll tab into view

init.coffee

`
var next_active_file_timer = 0;
atom.commands.onDidDispatch(function(event){
    //console.log('event type: ', event.type);
    clearTimeout(next_active_file_timer);
    if (event.type === 'tree-view:reveal-active-file') {
        next_active_file_timer = setTimeout(function(){
            var $ = atom.document.querySelector;
            var $pane   = $.call(atom.document, '.panes');
            var $bar    = $.call(atom.document, '.panes .tab-bar');
            var $active = $.call(atom.document, '.panes .tab.active');

            var w = $pane.offsetWidth;
            var mid = w/2;
            var bar_x = $bar.scrollLeft;
            var active_x = $active.offsetLeft;

            //console.log('vars: ', mid, w, bar_x, bar_x + w, active_x, event);
            if (active_x > (bar_x + w)) {
                $bar.scrollLeft = active_x - mid;
            } else if (active_x < bar_x) {
                if (active_x > w) {
                    $bar.scrollLeft = active_x - mid;
                } else {
                    $bar.scrollLeft = 0;
                }
            }
        }, 100);
    }

    return event;
});
`