Fix: weight input does not stay updated

When deselecting the input during weight selection, it would go back to the original value.  We need to let blazor know state has changed

LiftLog.Ui/Shared/Presentation/WeightDialog.razor

@@ -78,12 +78,14 @@
         if (string.IsNullOrWhiteSpace(value) && AllowNull)
         {
             EditorWeight = null;
+            StateHasChanged();
             return;
         }
 
         if (decimal.TryParse(value, out var result))
         {
             EditorWeight = result;
+            StateHasChanged();
         }
     }
 }