Feature: Don't show checkbox when no items are selected (#11961)

Author: yaira2

src/Files.App/Views/LayoutModes/DetailsLayoutBrowser.xaml.cs

@@ -819,7 +819,7 @@ private void UpdateCheckboxVisibility(object sender, bool? isPointerOver = null)
 				if (isPointerOver.HasValue)
 					control.SetValue(IsPointerOverProperty, isPointerOver);
 				// Handle visual states
-				if (control.IsSelected || control.GetValue(IsPointerOverProperty) is not false)
+				if (control.IsSelected || control.GetValue(IsPointerOverProperty) is not false && SelectedItems?.Count >= 1)
 					VisualStateManager.GoToState(userControl, "ShowCheckbox", true);
 				else
 					VisualStateManager.GoToState(userControl, "HideCheckbox", true);

src/Files.App/Views/LayoutModes/GridViewBrowser.xaml.cs

@@ -510,7 +510,7 @@ private void UpdateCheckboxVisibility(object sender, bool? isPointerOver = null)
 				if (isPointerOver.HasValue)
 					control.SetValue(IsPointerOverProperty, isPointerOver);
 				// Handle visual states
-				if (control.IsSelected || control.GetValue(IsPointerOverProperty) is not false)
+				if (control.IsSelected || control.GetValue(IsPointerOverProperty) is not false && SelectedItems?.Count >= 1)
 					VisualStateManager.GoToState(userControl, "ShowCheckbox", true);
 				else
 					VisualStateManager.GoToState(userControl, "HideCheckbox", true);