How to add comments to translations or delete translations?

[TheMen4ce]

Hi

I've just recently set up accent and so far it looks amazing. Still I have two questions of which I haven't found the answer in the docs:

How do I delete a translation?
It seems that once a key is uploaded, it remains forever in the DB. Same applies to when a key is renamed. Is there a way that prevents my DB from blowing up?

How do I add/edit comments?
Comments are essential to specify for translators (and devs) where a text is used within the app. Imported comments appear as fileComment but only get exported "correctly" for Android.xml (e.g. not for .properties or .strings - here they just get added above the translation "as is" without using the correct comment symbols # or /* */ ).
I couldn't find a way to edit or delete these. Is there one? Or is there another way to handle comments?

Thanks a lot :)