The suggestion for improvement is related to the following problem
I want to filter entries to a certain date ranges

E.g. JabRef should provide me with a list of all documents in my library that were published between 2001-05-17 and 2009-02-18.

Any of the below solutions would suffice

• Add this feature to the search bar
• Add this feature to group by date

Additional context
refs #8902
refs #14241, #14169
ISO 8601
According to https://docs.jabref.org/finding-sorting-and-cleaning-entries/search#searching-with-optional-spelling we already could do this with regex:
year == 200[5-9]|201[0-1]​specifies the range of years 2005-2011 (200[5-9] specifies years 2005-2009;| means "or"; 201[0-1] specifies years 2010-2011).
But I want something easier. Something that doesn't force me to type hundreds or lines of search expressions, if the date range is across multiple decades.