Add simple detection of timestamp resolution for CSV files

[evgfilim1]

Summary

Fixes #6498

Screenshots

N/A

Testing strategy

• Created a record in Firefox password manager
  
• Exported passwords in Firefox, then imported logins.csv file I got in stable (dark themed) and my snapshot (light themed) and compared the results.
  
  

Also:

• Imported my existing *.csv file from Firefox, works fine
• Run tests included with the code, all passed

Type of change

• ✅ Bug fix (non-breaking change that fixes an issue)

[droidmonkey]

UUID import is not a good idea, there is no reason for it from Firefox and it is a backend detail that the user is not allowed to mess with. Plus you aren't doing any duplication checks which can cause a huge mess. I will not merge a UUID import.

Secondly, last accessed is meaningless and doesn't need to be imported. I am likely going to hide that field from view because it literally is equal to modified time in the backend code.

The millisecond precision should be the only change in this code.

#3490 was already implemented, I'm closing that request.

[evgfilim1]

UUID import is not a good idea, there is no reason for it from Firefox and it is a backend detail that the user is not allowed to mess with. Plus you aren't doing any duplication checks which can cause a huge mess. I will not merge a UUID import.

Okay, I'll remove that, thanks for feedback.

Secondly, last accessed is meaningless and doesn't need to be imported. I am likely going to hide that field from view because it literally is equal to modified time in the backend code.

But when a database is imported from CSV, it has different access and modification timestamps, so I decided to add it in case someone needs this information. As far as I understood, it's better to remove this field also because it's useless, right? @droidmonkey

[droidmonkey]

Correct it is useless, probably need to fix the setting of the last accessed field. Just make it equal to modified.

[evgfilim1]

@droidmonkey done, could you review my changes now?

[mmokrejs]

Thanks for your effort, @evgfilim1 !