fix: small QoL: return to the last selected menu location (#1629)

## Summary

* **What is the goal of this PR?** Small UX improvement to the Home
screen by preserving the last selected cursor position when returning to
it.

It supersedes #985 and #1103, which are both significantly outdated and
hundreds of commits behind master.

---

### AI Usage

Did you use AI tools to help write this code? _**< YES >**_

src/activities/ActivityManager.h

@@ -16,6 +16,8 @@
 class Activity;    // forward declaration
 class RenderLock;  // forward declaration
 
+enum class HomeMenuItem { NONE, FILE_BROWSER, RECENTS, OPDS_BROWSER, FILE_TRANSFER, SETTINGS_MENU };
+
 /**
  * ActivityManager
  *
@@ -88,7 +90,7 @@ class ActivityManager {
   void goToBoot();
   void goToFullScreenMessage(std::string message, EpdFontFamily::Style style = EpdFontFamily::REGULAR);
   void goToCrashReport();
-  void goHome();
+  void goHome(HomeMenuItem initialMenuItem = HomeMenuItem::NONE);
 
   // This will move current activity to stack instead of deleting it
   void pushActivity(std::unique_ptr<Activity>&& activity);