Shorter, faster default caves index list

urls.py

@@ -11,6 +11,7 @@ from troggle.core.views.caves import (
     cave3d,
     cave_debug,
     caveindex,
+    cavesall,
     cavepage,
     caveQMs,
     caveslist,
@@ -157,6 +158,7 @@ trogglepatterns = [
     path('people_ids',   people_ids, name="people_ids"),
     path('folk_export',   folk_export, name="folk_export"),
     path('caveslist',        caveslist,      name="caveslist"),
+    path('cavesall',        cavesall,      name="cavesall"),
 
     path('entrances',      entranceindex,      name="entranceindex"),
     path('enttags',      entrancetags,      name="entrancetags"),