Fix edit box height expanding in Fix Common Errors step 2

The subtitle TextBox had no fixed height and VerticalAlignment.Stretch,
causing it to grow to fit content when long-text rules were selected,
which shrank the grids above it.

Author: Miklos Juhasz

src/ui/Features/Tools/FixCommonErrors/FixCommonErrorsWindow.cs

@@ -548,8 +548,7 @@ private Grid MakeStep2EditPanel()
             AcceptsReturn = true,
             TextWrapping = TextWrapping.Wrap,
             HorizontalAlignment = HorizontalAlignment.Stretch,
-            VerticalAlignment = VerticalAlignment.Stretch,
-            MinHeight = 60,
+            Height = 60,
             FontSize = Se.Settings.Appearance.SubtitleTextBoxFontSize,
             FontWeight = Se.Settings.Appearance.SubtitleTextBoxFontBold ? FontWeight.Bold : FontWeight.Normal,
             [!TextBox.TextProperty] = new Binding($"{nameof(_vm.SelectedParagraph)}.{nameof(SubtitleLineViewModel.Text)}")