Userview Theme defines the look and feel of a App.
One may also create its own Userview Theme as it is one of the plugable plugin.
In themes that support responsive design, Userview Theme such as V5 Janux Theme will display table in responsive mode. In themes that do not support responsive design, tables will be displayed without responsive mode. You can explicitly enable or disable such behavior by adding this script into the Userview Theme's settings such as the header.
<script> var _enableResponsiveTable = true; </script>