Multiple fixes around logging out

• Improve login status text. After logout, show "Not connected"
• REST: log out and cleanup properly
• DDP: don't force "logged out" right after connecting
• Ignore errors on LogoutCleanup, so we can attempt to log in again afterwards
• Include ECMEnableSanitizers to make it easy to build with sanitizers
• Log out from both DDP and REST
• Fix crash in restapiabstractjob (hard to reproduce)
• Fix Json for logout-cleanup
• Fix reconnect after suspend: wait for logout to complete before reconnect
• DDP: fix handling of server closing connection during logout