Bugfix: practice page reloads only when needed
Bugfix: practice page reloads only when needed

There was a bug which caused the practice page to reload when all words
have been finished. Then it would stop when the number of words to practice was
zero.

Now it reloads only when there are actually new words to practice.

hcs42/ExponWords,hcs42/ExponWords,hcs42/ExponWords,hcs42/ExponWords