Fix button deactivation after dictionary download

Julien LepillerSun May 31 17:10:49+0200 2020

7f88254

nani/app/furiganatextview/src/androidTest/java
namelast commitdate
eu/Switch to AndroidXSat Apr 25 23:54:54+0200 2020
se/Add furiganaMon Apr 15 20:09:48+0200 2019