Repositions the clear button element based on the textfield.inputEl element
@private
 /* FIX FOR 4.1 /*
repositionClearButton: function() {
var clearButtonEl = this.clearButtonEl;
if (!clearButtonEl) {
return;
}
var clearButtonPosition = this.calculateClearButtonPosition(this.textField);
clearButtonEl.dom.style.right = clearButtonPosition.right + 'px';
clearButtonEl.dom.style.top = clearButtonPosition.top + 'px';
},
function() {
            var clearButtonEl = this.clearButtonEl;
            if (!clearButtonEl) {
                return;
            }
            var right = 0;
            if (this.fieldHasScrollBar()) {
                right += Ext.getScrollBarWidth();
            }
            if (this.textField.triggerWrap) {
                right += this.textField.getTriggerWidth();
            }
            clearButtonEl.alignTo(this.textField.bodyEl, 'tr-tr', [-1 * (right + 3), 5]);
        }