[GNC] Auto-delete imbalance with no value in split

[Fred Bone]

On 09 April 2020 at 22:55, Håkon Fremstad said:

> Hi
> 
> Whenever I change the value of a split-transaction, I get an imbalance
> with the difference. And after I fix the imbalance in the
> split-transaction the imbalance stays there with no value. Is there a way
> to make these empty imbalances disappear automatically to make things
> neater?

It's easier to not let it happen in the first place, by keeping the txn 
balanced: adjust the values on both sides before trying to commit the 
change.