pgadmin 4.15 panel borders

[MacBook Pro (desktop only); PostgreSQL12; PGAdmin 4.15]

After struggling with missing or poorly defined light blue panel borders in the 4.13 Query Tool for the last several weeks, I installed 4.15 three days age. Well-defined (sepia colored) borders showed up which were perfect. Yesterday I was back to the partial blue borders. I may have inadvertently changed a setting at some point but have no idea where it was. A re-install of 4.15 and a search of the manual (Query Tool preferences) failed to help.

Help or some pointers on how to get the good borders back (in any color) would be appreciated.

[ I have used 9.4 and PgAdmin for 4+ years and have been successfully importing option data from the Thinkorswim trading platform for subsequent analysis. I am a 30+ year user of and DBA for Oracle and SQL Server but very limited with Postgres admin functions. SQL with Pg12 and PgAdmin 4.15 is perfect and all I need for now].

Thank you.

Joe
Gaithersburg, MD
jrimback1(at)verizon(dot)net <mailto:jrimback1(at)verizon(dot)net>
301-569-3541 (cell)