Force panel to stay open on wider screens in jQuery Mobile - jquery-mobile

Question

I want to create a mobile page for mobiles and tablets. When the user uses a tablet (larger screen), the left panel-navigation should stay open all time. When the user uses a mobile phone (smaller screen) there should be only a button top-left to open the panel.
Jquery has a demo, but obviously it is not working:
http://demos.jquerymobile.com/1.4.5/panel-responsive/
I tried the demo on JSfiddle but it also did not work:
<div data-role="page" class="jqm-demos ui-responsive-panel" id="panel-responsive-page1" data-title="Panel responsive page">
<div data-role="header">
<h1>Panel responsive</h1>
Menu
Add
</div><!-- /header -->
<div role="main" class="ui-content jqm-content jqm-fullwidth">
<h1>Panel responsive</h1>
<p>This is a typical page that has two buttons in the header bar that open panels. The left panel has the push display mode, the right panel reveal. To make this responsive, you can make the page re-flow at wider widths. This allows both the panel menu and page to be used together when more space is available. This behavior is controlled by CSS media queries. You can create a custom one for a specific breakpoint or use the breakpoint preset by adding the <code>class="ui-responsive-panel"</code> to the page container. We have added this class on this demo page. Note that when using the preset class, we also hide the dismiss layer on wider screens if the panel has the push display mode.</p>
<div data-demo-html="#panel-responsive-page1"></div><!--/demo-html -->
<br>
<br>
<br>
<br>
<br>
Back
</div><!-- /content -->
<div data-role="panel" data-display="push" data-theme="b" id="nav-panel">
<ul data-role="listview">
<li data-icon="delete">Close menu</li>
<li>Accordion</li>
<li>Ajax Navigation</li>
<li>Autocomplete</li>
<li>Buttons</li>
<li>Checkboxes</li>
<li>Collapsibles</li>
<li>Controlgroup</li>
<li>Dialogs</li>
<li>Fixed toolbars</li>
<li>Flip switch toggle</li>
<li>Footer toolbar</li>
<li>Form elements</li>
<li>Grids</li>
<li>Header toolbar</li>
<li>Icons</li>
<li>Links</li>
<li>Listviews</li>
<li>Loader overlay</li>
<li>Navbar</li>
<li>Navbar, persistent</li>
<li>Pages</li>
<li>New</li>
<li>Popup</li>
<li>Radio buttons</li>
<li>Select</li>
<li>Slider, single</li>
<li>New</li>
<li>New</li>
<li>New</li>
<li>Text inputs & textarea</li>
<li>Transitions</li>
</ul>
</div><!-- /panel -->
<div data-role="panel" data-position="right" data-display="reveal" data-theme="a" id="add-form">
<form class="userform">
<h2>Login</h2>
<label for="name">Username:</label>
<input type="text" name="name" id="name" value="" data-clear-btn="true" data-mini="true">
<label for="password">Password:</label>
<input type="password" name="password" id="password" value="" data-clear-btn="true" autocomplete="off" data-mini="true">
<div class="ui-grid-a">
<div class="ui-block-a">Cancel</div>
<div class="ui-block-b">Save</div>
</div>
</form>
</div><!-- /panel -->
</div><!-- /page -->
<div data-role="page" id="panel-responsive-page2">
<div data-role="header">
<h1>Landing page</h1>
</div><!-- /header -->
<div role="main" class="ui-content jqm-content">
<p>This is just a landing page.</p>
Back
</div><!-- /content -->
</div><!-- /page -->
http://jsfiddle.net/84m0b2au/
I searched a long time, found a half-working JS solution, but the panel does not stay open when i change the pages, only when i reload the page. I found some similar questions, obviousl it is an issue, but nowhere is a (for me) working solution.
So my question is, how can i solve the problem. The best way is to find a CSS-only solution.
Thank you very much for your tips.