Created attachment 104011 [details]
Steps to reproduce:
1. set autofilter
you can not adjust the width of the filter list
you can adjust the width of the filter list like MS Excel
Operating System: Windows 8
Version: 184.108.40.206 release
Thank you for your bug report.
Set status to enhancement because it actually works as designed.
Set platform to ALL.
Best regards. JBF
*** This bug has been marked as a duplicate of bug 49813 ***