Add screensaver/lock screen workaround for legacy Rokus.

We key off the screensaver to lock the screen. Legacy devices will show
the lock screen immediately, instead of keeping the screen saver in
view. This seems to also prevent the screensaver from running again,
keeping the lock screen displayed indefinitely. This fix (workaround)
will send an invalid keypress to the roku after the lockscreen is
displayed to reenable the internal roku idle timeouts, allowing the
screensaver to start again.

Plex/source/HomeUsersScreen.brs

@@ -10,6 +10,7 @@ function createHomeUsersScreen(viewController as object) as object
 
     obj.Show = homeusersShow
     obj.HandleMessage = homeusersHandleMessage
+    obj.OnTimerExpired = homeusersOnTimerExpired
 
     lsInitBaseListScreen(obj)
 
@@ -60,6 +61,14 @@ sub homeusersShow()
 
     m.screen.SetFocusedListItem(focusedIndex)
 
+    ' Workaround for screensaver/lockscreen issue on first gen Rokus
+    if NOT CheckMinimumVersion(GetGlobal("rokuVersionArr", [0]), [5, 1]) and GetGlobal("screenIsLocked") <> invalid then
+        timer = createTimer()
+        timer.Name = "legacyScreensaverLock"
+        timer.SetDuration(5000)
+        m.viewController.AddTimer(timer, m)
+    end if
+
     m.screen.Show()
 end sub
 
@@ -119,3 +128,10 @@ function homeusersHandleMessage(msg as object) as boolean
 
     return handled
 end function
+
+Sub homeusersOnTimerExpired(timer)
+    if timer.Name = "legacyScreensaverLock" AND m.ViewController.IsActiveScreen(m) then
+        Debug("Send keypress to reenable internal Roku screensaver timeout")
+        SendEcpCommand("Lit_*")
+    end if
+End Sub