 Version 6.14.7

* corrected some deeplinks in manifest file on OPMLActivity
* added commentTime in Episode and Feed to record the time of comment/opinion added
* when adding/editing a comment/opinion, a time stamp is automatically added in the text field
* when removing a feed or an episode, a time stamp is automatically added in the text field
* a new sorting item on episodes based on commentTime
* in episodes list, if an episode belongs to a synthetic feed, tapping on the image will bring up EpisodeInfo instead of FeedInfo
* some class restructuring
* more preferences fragments are in Compose
