Bug 1826882 - Open `TabsTray` in the private page when opening it from an active private tab

app/src/main/java/org/mozilla/fenix/browser/BaseBrowserFragment.kt

@@ -146,6 +146,7 @@ import org.mozilla.fenix.onboarding.FenixOnboarding
 import org.mozilla.fenix.perf.MarkersFragmentLifecycleCallbacks
 import org.mozilla.fenix.settings.SupportUtils
 import org.mozilla.fenix.settings.biometric.BiometricPromptFeature
+import org.mozilla.fenix.tabstray.Page
 import org.mozilla.fenix.tabstray.ext.toDisplayTitle
 import org.mozilla.fenix.theme.ThemeManager
 import org.mozilla.fenix.utils.allowUndo
@@ -362,7 +363,12 @@ abstract class BaseBrowserFragment :
                 thumbnailsFeature.get()?.requestScreenshot()
                 findNavController().nav(
                     R.id.browserFragment,
-                    BrowserFragmentDirections.actionGlobalTabsTrayFragment(),
+                    BrowserFragmentDirections.actionGlobalTabsTrayFragment(
+                        page = when (activity.browsingModeManager.mode) {
+                            BrowsingMode.Normal -> Page.NormalTabs
+                            BrowsingMode.Private -> Page.PrivateTabs
+                        },
+                    ),
                 )
             },
             onCloseTab = { closedSession ->