dont fail on lack of free space. just warn. figure out issue later. allow KEY_BACK
diff --git a/default_recovery_ui.c b/default_recovery_ui.c
index c6955c0..9a54964 100644
--- a/default_recovery_ui.c
+++ b/default_recovery_ui.c
@@ -64,6 +64,7 @@
             case KEY_POWER:
             case KEY_END:
             case KEY_BACKSPACE:
+            case KEY_BACK:
                 if (!get_allow_toggle_display())
                     return GO_BACK;
         }