Tweak: Connection indication color steps
The RTT steps are now as following:
0 - 50ms : green 51 - 100ms : orange 101 - 150ms : red
151ms : grey
To generate a more accurate indication on a first load of the app (reload for example) there will be 5 calls to the robots.txt file. When clicking on the connection indicator image or when the connection is tested again there will be only 2 calls to the file - just as before.
Fixes #361 (closed)