Spark Property to Collapse Groups as default

I’ve done a bit of searching - but a lot of the info I’ve found is very outdated:

Currently, I have 19 primary groups (each for a physical building on our network), and each of those has a few nested groups. When Spark opens, all the groups are expanded with logged in users.

Is there something that I can use in the Spark.Properties file (Spark 2.8.3) that will start with all of the groups collapsed? I know that you can right-click and collapse all - but I’d prefer to start that way for all my users - for the most part, they will primarily be chatting within their location - and this would make the appearance a bit cleaner.

Thanks.

There is groups.properties file in Spark’s profile, which tracks the state of group. True for collapsed, false for expanded.

Thanks!