FancyMenu: fix Enter key not working

- Add comment in event filter

plugin-fancymenu/lxqtfancymenuwindow.cpp

@@ -432,8 +432,23 @@ bool LXQtFancyMenuWindow::eventFilter(QObject *watched, QEvent *e)
             || watched == mCategoryView->viewport()
             || watched == mAppView->viewport()))
     {
+        /* Basically we take all keyboard events sent to:
+         *
+         * - Search QLineEdit
+         * - App QListView's viewport()
+         * - Category QListView's viewport()
+         *
+         * And we manually redirect them to the selected one.
+         * Then event gets eaten up so it doesn't get processed
+         * by it's original destination widget.
+         *
+         * If selected item is same as destination widget, no
+         * redirection happens, we call default event filter
+         * to let Qt manage it's internal state.
+         */
+
         QKeyEvent *ev = static_cast<QKeyEvent *>(e);
-        if(ev->key() == Qt::Key_Return)
+        if(ev->key() == Qt::Key_Return || ev->key() == Qt::Key_Enter)
         {
             activateCurrentApp();
             return true;