Improve page load performance

Author: SanderMertens

etc/index.html

@@ -58,39 +58,39 @@
         </template>
       </menu-bar>
 
-      <template v-if="app_params.page == 'entities'">
+      <template v-if="app_params.page == 'entities' && pageReady('entities')">
         <page-entities 
           :conn="conn"
           v-model:app_params="app_params"
           :app_state="app_state">
         </page-entities>
       </template>
 
-      <template v-if="app_params.page == 'queries'">
+      <template v-if="app_params.page == 'queries' && pageReady('queries')">
         <page-queries 
           :conn="conn"
           v-model:app_params="app_params"
           :app_state="app_state">
         </page-queries>
       </template>
 
-      <template v-if="app_params.page == 'stats'">
+      <template v-if="app_params.page == 'stats' && pageReady('stats')">
         <page-stats 
           :conn="conn"
           v-model:app_params="app_params"
           :app_state="app_state">
         </page-stats>
       </template>
 
-      <template v-if="app_params.page == 'commands'">
+      <template v-if="app_params.page == 'commands' && pageReady('commands')">
         <page-commands 
           :conn="conn"
           v-model:app_params="app_params"
           :app_state="app_state">
         </page-commands>
       </template>
 
-      <template v-if="app_params.page == 'internals'">
+      <template v-if="app_params.page == 'internals' && pageReady('internals')">
         <page-internals 
           :conn="conn"
           v-model:app_params="app_params"