Application list does not automatically rebuild immediately after restoring backup

[wsot]

When a backup is restored, it invalidates the list of applications (because they can have all new settings, etc). This should trigger list regeneration as soon as the user returns to the application list screen, but it doesn't, because it doesn't check the list validity on the correct event.

[xLaMbChOpSx]

Made a pull request for this one as well, set app cache as invalid on restore of backup, added a check for this in the onResume of app list. Now when returning to app list after restoring a backup an automatic rebuild occurs.