WebHost: save datatables state (#1145)

* WebHost: save datatables state

* WebHost: Fix DataTables local storage keys.

Co-authored-by: recklesscoder <57289227+recklesscoder@users.noreply.github.com>

WebHostLib/static/assets/tracker.js

@@ -17,6 +17,13 @@ window.addEventListener('load', () => {
         paging: false,
         info: false,
         dom: "t",
+        stateSave: true,
+        stateSaveCallback: function(settings,data) {
+            localStorage.setItem(`DataTables_${settings.sInstance}_/tracker`, JSON.stringify(data));
+        },
+        stateLoadCallback: function(settings) {
+            return JSON.parse(localStorage.getItem(`DataTables_${settings.sInstance}_/tracker`));
+        },
         columnDefs: [
             {
                 targets: 'hours',