Add current CPS to the browser tab as text

[WaltervonGabain]

Describe the solution you'd like
I'd like to see the CPS of the node / network without opening the actual tab so it would be nice to have the possibility of seeing the active CPS in the tab text instead of "NanoLooker Block Explorer".

Describe alternatives you've considered
It could be a configurable option where you can choose to see the CPS of the NanoLooker node or the CPS of the network itself.