Include total PT usage in userstats-bridge-transport

Hello,

this is like #11399 (moved), but it would be great if the graphs could also include scramblesuit users.

It would also be amazing if there was a graph that prints the sum of all the PT activity. So that we can compare that graph with the total OR activity (userstats-bridge-country) to evaluate the deployment of PTs.

If you need help with the coding, please tell me.

(Hm, actually I don't know whether userstats-bridge-country includes PT activity.)

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