1) Fix some erroneous strings that could be emitted during an ATF update.
2) With ATF on, if you've attempted to play a file that could not be found, when the file is found during a scan, the playlist item will be enabled again. This is
implemented in a very fast fashion (only disabled items are added to the ptrlist, checks are made against the pointers to the items in the list, which is very
fast, etc...) and given that there are generally few disabled items compared to many enabled items, this does not have noticeable overhead.
3) It's totally cool.