More clean up of the JS code.

app/js/app_ui_presentations.js

@@ -3,6 +3,13 @@ async function render_event_presentation_records(events) {
   console.log('Rendering event presentation records...');
   console.log('****************** Presentations ******************');
   
+  if (looping_tbl_event_presentation) {
+    console.log('Already looping through the tbl_event_presentation table. Not starting until finished.');
+    return false;
+  } else {
+    
+  }
+  
   let launcher_sessions = document.getElementById('launcher_sessions').childNodes; //_list_items
   //console.log(launcher_sessions);
   
@@ -45,6 +52,7 @@ async function render_event_presentation_records(events) {
           
         }).then(function() {
           console.log('idb_to_ui: Iterate tbl_event_presentation looking for presentations to update or remove is complete');
+          
           looping_tbl_event_presentation = false;
         });
       }
@@ -151,8 +159,7 @@ async function render_event_presentation_records(events) {
         // Trying to remove old ID in case there is one already rendered
         try {
           document.getElementById('event_presentation_'+value.id).remove();
-        }
-        catch(err) {
+        } catch(err) {
           console.log('A node with the ID of event_presentation_'+value.id+' was not found. In most cases this is expected.');
           console.log(err.message);
         }