Learning / cards counter value

[kruettlip]

The couter which shows the total amount of cards you have to learn works, but if there are less than 20 cards (or the specified amount of cards to learn) it still shows that you're learning card X/20.

[kruettlip]

I searched in the code for the problem but haven't found it yet.
Looks like this could be a non-working SQL-statement.
Entity.java, ConfigModel.java and LearnView.java are the classes you will probably need to fix this issue.

@hlucca this could be another bug for you...