Collapse/expand groups

Hi! I have a lot of groups (probably a couple of hundred) with countless account entries accumulated over the years.
Trying to find one is literally like finding a needle in a haystack. These are organised so that it is possible to browse to a specific area/context and then search or pick an entry within.
Would it be possible to add collapse/expand buttons next to the group names to make that a bit easier? Thanks!

see Groups Navigation is very confusing - why not as "folders"?