Fixed critical failure when advanced filter contains an empty query

Author: jschick04

src/EventLogExpert/Shared/Components/Filters/AdvancedFilterRow.razor.cs

@@ -50,6 +50,13 @@ private void SaveFilter()
     {
         if (!string.IsNullOrEmpty(_errorMessage)) { return; }
 
+        if (string.IsNullOrWhiteSpace(Value.Comparison.Value))
+        {
+            _errorMessage = "Cannot save an empty filter";
+
+            return;
+        }
+
         Dispatcher.Dispatch(new FilterPaneAction.SetFilter(Value with { IsEditing = false, IsEnabled = true }));
     }
 

src/EventLogExpert/Shared/MainLayout.razor.cs

@@ -11,10 +11,10 @@ namespace EventLogExpert.Shared;
 
 public sealed partial class MainLayout
 {
-    [Inject] private IDispatcher Dispatcher { get; init; } = null!;
-
     [Inject] private IAppTitleService AppTitleService { get; init; } = null!;
 
+    [Inject] private IDispatcher Dispatcher { get; init; } = null!;
+
     protected override async Task OnAfterRenderAsync(bool firstRender)
     {
         if (firstRender)