Adding custom entries

[Neintonine]

Would close: #1612

Translations for english and german are already done on my machine, but I don't have access to the database at the moment.

[Neintonine]

My proposal in the case about the second version and how to handle it.

One thing I though about, to create a V1.5.3 (or 1.5.2.Alpha5, idk), since its a feature I saw often in the issue tab (and heard often from other users). I mean, apart from figuring out how your internal datastructure works, the actual implementation is fairly simple (with the table implementation being the most complicated). So I could just recreate in V2.