Include Version of HTMO in post request or any other attribute for debug

if there are thousands of HTMO users, Admin can see only domlog files or run some debug commands. in majority of cases, root cause of issue is OLD version of HTMO.

it would be good to:

1. Keep on server last available version (already realized with autoupdate.nsf).

2. Compare users HTMO version and Server Latest available HTMO version, so users may get information message that his addon is out of date.

3. Most important, when debugging issue, is see remotelly version of problematic User.

This can be done if we include Version information in Post request. of course not in all requests, but at least in login.

POST /Traveler?Action=sync&DeviceID=IMSMO_xxxx&Version=3.0.5

Estimation to realize this is few hours (+testing,documentation), while it will help a lot to identify old client. or even automate this with monitoring or agent, that these users use old clients.