upgrade

main/template/default/learnpath/impress.tpl

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+<div class="fallback-message">
+    <p>Your browser <b>doesn't support the features required</b> by impress.js, so you are presented with a simplified version of this presentation.</p>
+    <p>For the best experience please use the latest <b>Chrome</b>, <b>Safari</b> or <b>Firefox</b> browser.</p>
+</div>
+
+<div id="impress">
+    {{ html }}
+</div>
+<div id="impress-toolbar"></div>
+
+<div class="hint">
+    <p>Use a spacebar or arrow keys to navigate</p>
+</div>
+<script>
+if ("ontouchstart" in document.documentElement) {
+    document.querySelector(".hint").innerHTML = "<p>Tap on the left or right to navigate</p>";
+}
+</script>
+
+<script>
+$(function() {
+    impress().init();
+});
+</script>
+<script type="text/javascript" src="{{_p.web_lib}}javascript/impress/impress.js"></script>