Don't show the "Web Search" action in the media context menu

All this does is try to web search for the filename of the image, which
is useless. Let's hide it entirely in this case.

src/qml/DelegateContextMenu.qml

@@ -70,6 +70,11 @@ Loader {
      */
     property list<Kirigami.Action> actions
 
+    /**
+     * @brief Whether the web search menu should be shown or not.
+     */
+    property bool enableWebSearch: true
+
     /**
      * Some common actions shared between menus
      */
@@ -173,6 +178,7 @@ Loader {
                 id: webshortcutmenu
                 title: i18n("Search for '%1'", webshortcutmodel.trunkatedSearchText)
                 property bool isVisible: webshortcutmodel.enabled
+                property bool isVisible: webshortcutmodel.enabled && root.enableWebSearch
                 Component.onCompleted: {
                     webshortcutmenu.parent.visible = isVisible;
                 }