[FIX] web: virtual keyboard is always showing during navigation

Before this commit, the search bar auto focus was already disable
on mobile based on media queries.
But "isMobile" equals false since we force the desktop mode.

To fix this, we use isMobileDevice which doesn't depend on the
resolution.

Task ID: 2090202

addons/web/static/src/js/views/control_panel/control_panel_renderer.js

@@ -185,7 +185,7 @@ var ControlPanelRenderer = Renderer.extend({
      * @private
      */
     _focusSearchInput: function () {
-        if (this.withSearchBar && !config.device.isMobile) {
+        if (this.withSearchBar && !config.device.isMobileDevice) {
             // in mobile mode, we would rather not focus manually the
             // input, because it opens up the integrated keyboard, which is
             // not what you expect when you just selected a filter.