Fix: Fixed crash when changing tab with one git repository open (#12575)

Author: ferrariofilippo

src/Files.App/Views/MainPage.xaml.cs

@@ -156,6 +156,9 @@ public void MultitaskingControl_CurrentInstanceChanged(object? sender, CurrentIn
 			SidebarAdaptiveViewModel.PaneHolder.PropertyChanged += PaneHolder_PropertyChanged;
 			SidebarAdaptiveViewModel.NotifyInstanceRelatedPropertiesChanged((navArgs as PaneNavigationArguments).LeftPaneNavPathParam);
 
+			if (SidebarAdaptiveViewModel.PaneHolder?.ActivePaneOrColumn.SlimContentPage?.DirectoryPropertiesViewModel is not null)
+				SidebarAdaptiveViewModel.PaneHolder.ActivePaneOrColumn.SlimContentPage.DirectoryPropertiesViewModel.ShowLocals = true;
+
 			UpdateStatusBarProperties();
 			UpdateNavToolbarProperties();
 			LoadPaneChanged();

src/Files.App/Views/Shells/BaseShellPage.cs

@@ -261,7 +261,7 @@ protected void FilesystemViewModel_GitDirectoryUpdated(object sender, EventArgs
 				return;
 
 			InstanceViewModel.UpdateCurrentBranchName();
-			ContentPage.DirectoryPropertiesViewModel.UpdateGitInfo(
+			ContentPage?.DirectoryPropertiesViewModel.UpdateGitInfo(
 				InstanceViewModel.IsGitRepository,
 				InstanceViewModel.GitRepositoryPath,
 				GitHelpers.GetBranchesNames(InstanceViewModel.GitRepositoryPath));