Fix issue MR-181 - Sessions on startup

Thanks to tbstudee
https://github.com/tbstudee/mRemoteNG/commit/fa18d10f4a4ea93aa009e9adb379b46b73765cb7
Fix RDGatewayPassword is unencrypted in confCons.xml file

(cherry picked from commit 5a97032f290e485831d659b680c4643d31265990)

Conflicts:
	mRemoteV1/Config/Config.Connections.Save.vb