Improve Freebuff session limit messaging #784

Job	Run time
build-and-smoke-freebuff-windows	2m 52s
build-freebuff	1m 14s
e2e-ads-behavior	1m 4s
e2e-startup	1m 17s
e2e-help-command	1m 12s
e2e-slash-commands	1m 4s
e2e-code-edit	1m 1s
e2e-terminal-command	1m 8s
e2e-agent-startup	3m 28s
e2e-version	58s
	15m 18s

Provide feedback