PLT-7633 (E20) Add session idle timeout config setting (#7524)

* Add session idle timeout config setting

* Modify config setting name to SessionIdleTimeoutInMinutes

* Small re-org of if statement

* Merge with latest master

model/config.go

@@ -182,6 +182,7 @@ type ServiceSettings struct {
 	SessionLengthMobileInDays                *int
 	SessionLengthSSOInDays                   *int
 	SessionCacheInMinutes                    *int
+	SessionIdleTimeoutInMinutes              *int
 	WebsocketSecurePort                      *int
 	WebsocketPort                            *int
 	WebserverMode                            *string
@@ -1155,6 +1156,11 @@ func (o *Config) SetDefaults() {
 		*o.ServiceSettings.SessionCacheInMinutes = 10
 	}
 
+	if o.ServiceSettings.SessionIdleTimeoutInMinutes == nil {
+		o.ServiceSettings.SessionIdleTimeoutInMinutes = new(int)
+		*o.ServiceSettings.SessionIdleTimeoutInMinutes = 0
+	}
+
 	if o.ServiceSettings.EnableCommands == nil {
 		o.ServiceSettings.EnableCommands = new(bool)
 		*o.ServiceSettings.EnableCommands = false