Cleaned up unnecessary code
Merge remote-tracking branch 'upstream/master'
localisation
localisation
fix crashes when calling custom study details again
consistent back key behaviour on study options
fix minor issue which prevented db check start
bump version to beta 21
add hint for dyn decks
colour dyn decks in dck picker
fix bug 4081341
localisation
fix issue 1502
catch closing errors but report them nevertheless
fix for issue 1503
more consistent behaviour of back button in study options
fix 1509
update values after finishing congrats view
localisation
add option to save on internal memory