[ui.datepicker] Datepicker status bar floating issue

The status bar text is sometimes shown in the top row of the date picker instead of the bottom row. This happens due to not clearing the floats when displaying multiple months.

A quick fix in line 1350 solves the issue:

Change from

html += (showStatus ? '<div id="datepicker_status_' + this._id + 

to:

html += (showStatus ? '<div style="clear: both;"></div><div id="datepicker_status_' + this._id + 

Simple testcase that shows the floating issue:

$("input.dateperiod").datepicker({
    showStatus: true,
    rangeSelect: true,
    numberOfMonths: [1,2],
    stepMonths: 1
  });