[fix](trx-frontend): preload AIS map icons

src/trx-client/trx-frontend/trx-frontend-http/assets/web/index.html

@@ -1624,6 +1624,8 @@ SPDX-License-Identifier: GPL-2.0-or-later
     </div>
   </div>
   <script defer src="https://cdn.jsdelivr.net/npm/opus-decoder@0.7.11/dist/opus-decoder.min.js" charset="UTF-8"></script>
+  <script defer src="/vendor/leaflet.js"></script>
+  <script defer src="/leaflet-ais-tracksymbol.js"></script>
   <script defer src="/webgl-renderer.js"></script>
   <script defer src="/app.js"></script>
   <script>
@@ -1632,7 +1634,7 @@ SPDX-License-Identifier: GPL-2.0-or-later
   var pluginScripts = {
     'digital-modes': ['/ft8.js', '/ft4.js', '/ft2.js', '/wspr.js', '/cw.js', '/background-decode.js', '/sat.js', '/wefax.js'],
     'map-data': ['/map-core.js', '/ais.js', '/vdes.js', '/aprs.js', '/hf-aprs.js'],
-    'map': ['/map-core.js', '/leaflet-ais-tracksymbol.js', '/ais.js', '/vdes.js', '/aprs.js', '/hf-aprs.js', '/sat.js', '/sat-scheduler.js'],
+    'map': ['/map-core.js', '/ais.js', '/vdes.js', '/aprs.js', '/hf-aprs.js', '/sat.js', '/sat-scheduler.js'],
     'statistics': ['/map-core.js'],
     'bookmarks': ['/bookmarks.js'],
     'recorder': [],
@@ -1667,6 +1669,5 @@ SPDX-License-Identifier: GPL-2.0-or-later
 })();
   </script>
   <!-- Template cloning is handled by navigateToTab() in app.js -->
-  <script defer src="/vendor/leaflet.js"></script>
 </body>
 </html>