Indicator of email from how much time is synchronized

Checklist

• I have used the search function to see if someone else has already submitted the same feature request.
• I will describe the problem with as much detail as possible.
• This issue only contains a request for one single feature, not multiple (related) features.

App version

8.0

Problem you are trying to solve

Indicating user that thunderbird is fetching messages from this much time during synchronization.
So recently I was synching a folder and it was showing nothing in it, then I checked that I configured it to sync messages from last 2 weeks, but there was no emails from last 2 weeks in that folder.(it caused little confusion for a while🤣)

Suggested solution

Add an indicator text at the end of emails. Example, Fetched emails from 2 weeks.
It would supposedly reduce confusion in cases as described in above section.

Screenshots / Drawings / Technical details

No response

No source file, test, or entry point is named. Start by locating the synchronization and message-list UI, then trace how the configured sync period is represented; done means showing the requested fetched-period indicator without confusing an empty folder with an incomplete sync.