Layout fixed to be centered, notebook expanding to enable higher number of tabs in large window, added mp3 data creation on usb and included mp3 in loading data from usb using app temp path, added functionality to delete single pages.
Included mp3 directory in player script backup and data update routines, added creation of random playlist of given mp3s and endless loop playing of playlist, if no mp3s given radio stream is used as fallback. Needs tests and debugging on rpi now.