Address compiler warnings

WebApp/Components/Features/Students/Create.razor

@@ -10,7 +10,7 @@
     ShowBackButton="true"
     BackButtonUrl="/students" />
 
-<EditForm id="create-student-form" Model="Student" OnValidSubmit="OnValidSubmit" Enhance>
+<EditForm Model="Student" OnValidSubmit="OnValidSubmit" Enhance>
     <FormChangeTracker @ref="_formChangeTracker" />
     <AntiforgeryToken />
     <DataAnnotationsValidator />
@@ -26,13 +26,12 @@
             </MudPaper>
         </MudItem>
     </MudGrid>
+    <FormActions>
+        <MudButton ButtonType="ButtonType.Submit" Variant="Variant.Filled" Color="Color.Primary">Create</MudButton>
+        <MudButton OnClick="HandleCancel" Variant="Variant.Text">Cancel</MudButton>
+    </FormActions>
 </EditForm>
 
-<FormActions>
-    <MudButton ButtonType="ButtonType.Submit" Variant="Variant.Filled" Color="Color.Primary" Form="create-student-form">Create</MudButton>
-    <MudButton OnClick="HandleCancel" Variant="Variant.Text">Cancel</MudButton>
-</FormActions>
-
 @code {
     [SupplyParameterFromForm]
     private Student Student { get; set; } = new() { TsaYear = 1 };

WebApp/Components/Features/Students/EventRanking.razor

@@ -97,11 +97,11 @@ else
     private Student[]? _students;
 
     private class EventStudentRankings {
-        public EventDefinition Event {get; set;  }
-        public Tuple<Student,int> [] StudentRanking { get; set; }
+        public required EventDefinition Event {get; set;  }
+        public required Tuple<Student,int>[] StudentRanking { get; set; }
     }
 
-    private EventStudentRankings[] _eventStudentRankings;
+    private EventStudentRankings[] _eventStudentRankings = null!;
     private int _maxEventStudentRankings;
 
     protected override async Task OnInitializedAsync()

WebApp/Components/Features/Students/Index.razor

@@ -32,15 +32,13 @@
                         }
                     </MudStack>
                     <MudStack Row="true" AlignItems="AlignItems.Center" Spacing="1">
-                        <MudIconButton Icon="@Icons.Material.Filled.Edit"
-                                       Size="Size.Small"
-                                       Href="@($"/students/edit?id={context.Item.Id}&returnUrl=/students")"
-                                       Title="Edit" />
-                        <MudIconButton Icon="@Icons.Material.Outlined.Delete"
-                                       Size="Size.Small"
-                                       Color="Color.Error"
-                                       OnClick="() => DeleteStudent(context.Item!)"
-                                       Title="Delete" />
+                        <IconButtonWithTooltip Icon="@Icons.Material.Filled.Edit"
+                                               TooltipText="Edit"
+                                               Href="@($"/students/edit?id={context.Item.Id}&returnUrl=/students")" />
+                        <IconButtonWithTooltip Icon="@Icons.Material.Outlined.Delete"
+                                               TooltipText="Delete"
+                                               Color="Color.Error"
+                                               OnClick="() => DeleteStudent(context.Item!)" />
                     </MudStack>
                 </MudStack>
             </CellTemplate>