Add Freebuff session restart option (#603) #526

Job	Run time
build-and-smoke-freebuff-windows	2m 30s
build-freebuff	1m 22s
e2e-startup	1m 4s
e2e-slash-commands	1m 10s
e2e-ads-behavior	1m 6s
e2e-version	1m 11s
e2e-help-command	1m 19s
e2e-agent-startup	1m 22s
e2e-terminal-command	56s
e2e-code-edit	1m 12s
	13m 12s

Provide feedback