recovery: Remember the last log position.

After reading one log entry, it should stay at the same menu position.

Test: 'View recovery logs' -> Read -> Exit
Change-Id: I4b579be4c2fe1e3a1dcc4873e128fd0b2d619ba3
diff --git a/recovery.cpp b/recovery.cpp
index 8c214be..5c60ce6 100644
--- a/recovery.cpp
+++ b/recovery.cpp
@@ -972,8 +972,9 @@
 
     const char* headers[] = { "Select file to view", nullptr };
 
+    int chosen_item = 0;
     while (true) {
-        int chosen_item = get_menu_selection(headers, entries, 1, 0, device);
+        chosen_item = get_menu_selection(headers, entries, 1, chosen_item, device);
         if (strcmp(entries[chosen_item], "Back") == 0) break;
 
         ui->ShowFile(entries[chosen_item]);