store translation state in po files

**Is your feature request related to a problem? If so, please describe.**
The fear for dataloss would be gone if state of translation would be part of po file.

**Describe the solution you'd like**
Needs edit, results in fuzzy comment in po
I would love to have approved state in po file too or some way to distinquish between translated and approved
the loss of comments is bad, but state is much worser

**Describe alternatives you've considered**
A clear and concise description of any alternative solutions or features you've considered.

**Additional context**
Add any other context or screenshots about the feature request here.