Fix a problem with SPACE key not working in comment editor.

    afterRender: function() {

        this.callParent(arguments);

        // Remove the keydown handler set up in Ext.view.View#afterRender

        // which prevents CodeMirror from receiving the event when the SPACE key is pressed.

        this.mun(this.getTargetEl(), "keydown");

        this.delegateClick("a.voteCommentUp", function(el, r) {

            this.vote(el, r, "up");

        }, this);