 Version 6.13.10

* fixed Spinner in Subscriptions: All tags vs Untagged irregularity
* fixed video mode setting not available in first created synthetic feed
* created a new dialog to rename or create synthetic feed
* in Subscriptions menu, "New synthetic Youtube" is merged into "New synthetic feed"
* removed "Switch queue" option from all menus (not necessary)
* fixed Spinner in Queues: default text not updating
* fixed menu in Statistics
* corrected duration and timeSpent numbers for today in Statistics
* added a Statistics section in README.md
* added "Never ask again" in dialog for unrestricted background permission
* various prefs accesses are made lazy
* build apk dropped to target Android 14 due to some reported issued with Android 15.
