Fix: Fixed an issue where selection would get canceled after pressing upper arrow key (#13847)

Author: RieBi

src/Files.App/Views/Layouts/BaseGroupableLayoutPage.cs

@@ -286,6 +286,8 @@ protected virtual async void RenameTextBox_LostFocus(object sender, RoutedEventA
 		protected async void RenameTextBox_KeyDown(object sender, KeyRoutedEventArgs e)
 		{
 			var textBox = (TextBox)sender;
+			var isShiftPressed = (InteropHelpers.GetKeyState((int)VirtualKey.Shift) & KEY_DOWN_MASK) != 0;
+
 			switch (e.Key)
 			{
 				case VirtualKey.Escape:
@@ -300,11 +302,13 @@ protected async void RenameTextBox_KeyDown(object sender, KeyRoutedEventArgs e)
 					e.Handled = true;
 					break;
 				case VirtualKey.Up:
-					textBox.SelectionStart = 0;
+					if (!isShiftPressed)
+						textBox.SelectionStart = 0;
 					e.Handled = true;
 					break;
 				case VirtualKey.Down:
-					textBox.SelectionStart = textBox.Text.Length;
+					if (!isShiftPressed)
+						textBox.SelectionStart = textBox.Text.Length;
 					e.Handled = true;
 					break;
 				case VirtualKey.Left:
@@ -316,7 +320,6 @@ protected async void RenameTextBox_KeyDown(object sender, KeyRoutedEventArgs e)
 				case VirtualKey.Tab:
 					textBox.LostFocus -= RenameTextBox_LostFocus;
 
-					var isShiftPressed = (InteropHelpers.GetKeyState((int)VirtualKey.Shift) & KEY_DOWN_MASK) != 0;
 					NextRenameIndex = isShiftPressed ? -1 : 1;
 
 					if (textBox.Text != OldItemName)