Updates to save viewport data across sessions / while switching tabs

Packages/viewerbase/components/basic/layout/layout.html

@@ -1,5 +1,5 @@
 <template name="layout">
-    <nav class="navbar navbar-default" role="navigation">
+    <nav class="navbar navbar-default noselect" role="navigation">
         <div class="container-fluid">
             <div class="navbar-header">
                 <button type="button" class="navbar-toggle collapsed" data-toggle="collapse" data-target="#navbar" aria-expanded="false" aria-controls="navbar">