Hide button for twitter

Snippet to use with Control Freak or any other way to inject Javascript every time you open Twitter.

// ==UserScript==
// @name       Twitter STFO
// @namespace  http://twitter.com/ivanca
// @version    0.8
// @description  Delete button for individual annoying tweets you hate to read again!
// @match      https://twitter.com/*
// @copyright  2012+, You
// ==/UserScript==

(function () {

    var w = window.unsafeWindow ? unsafeWindow : window.top;
    var $ = w.$;

    if(w.$){
        $(ini);
    } else {        
        Object.defineProperty(w, "jQuery", {
            _this: null,
            get: function() {
                return this._this;
            },
            set: function(val) {
                this._this = val;
                $ = val;
                ini();
            }
        });   
    }

    function ini(){
        w.hideThis = function (btn) {
            var $tweet = $(btn).closest(".js-stream-item");
            $tweet.hide();
            localStorage[ns] += $tweet.attr("data-item-id") + ",";
            return false;
        };

        var ns = "deletedBy" + ($(".account-summary").find("[data-user-id]").attr("data-user-id") || -1);
        localStorage[ns] = localStorage[ns] || "";
        var deleted = localStorage[ns].split(",");

        if (deleted.length > 200) {
            localStorage[ns] = deleted.splice(-200).join(",");
        }

        var ruleNs = '#stream-item-tweet-';
        $("head").append('<style>' + ruleNs + deleted.join(',' + ruleNs) + '{ display:none !important; }</style>');
        ruleNs = '#stream-item-activity-';
        $("head").append('<style>' + ruleNs + deleted.join(',' + ruleNs) + '{ display:none !important; }</style>');

        var btn = '<li class="hide-stream"><a class="js-hide-tweet" onClick="hideThis(this)" href="#" data-nav="hide_tweet" title="Hide Tweet">Hide Tweet</a></li>';

        $("body").on("mouseover", ".dropdown-toggle", function () {
            var $tweet = $(this).closest(".js-stream-item");
            $tweet.not(":has(.hide-stream)").find(".dropdown-menu").append(btn);
        });
    }

})();