Feature: tracking of unsold profits

[Balvald]

Show the profits of currently unsold but fully scanned biodata.

Track the scanned profits for biodata and subtract the amount sold, since you don't have to sell all data at once.

Set the value to 0 Cr. instead of it going negative for some cases when things were scanned while the plugin was unable to track it because EDMC was not used/the plugin was not loaded/active.

No tracking of the bonus the player can get when selling bio data that because its impossible to know if the player gets it beforehand.

edit; when this was written it was in fact not finished on the dev branch.

[Balvald]

Got implemented and is working on the dev branch with 6238f72