Console Output (and Code (and Comments)) still refer to "Broadcaster"

Describe the bug

There are still references to the "Broadcaster" actor in the code, comments and operation. This is confusing for people using the software, and also to developers wanting to contribute to the software.

To Reproduce

Look at the code, watch the console output, look for references to "Broadcaster". Alternatively, do a search in github for the word "broadcaster" and see how many you can find.

Expected behaviour

I expect that all references to "Broadcaster" are replaced with references to "Gateway". This should be done as a refactoring exercise throughout, in function names and other code, comments, text strings. It need to be consistent and clear and not confusing.

Screenshots

Desktop (please complete the following information):

• OS: [e.g. iOS]
• Browser [e.g. chrome, safari]
• Version [e.g. 22]

Smartphone (please complete the following information):

• Device: [e.g. iPhone6]
• OS: [e.g. iOS8.1]
• Browser [e.g. stock browser, safari]
• Version [e.g. 22]

Additional context
Add any other context about the problem here.

Search the repository for "Broadcaster" and "broadcaster", then inspect each code reference, console string, function name, comment, and operation mentioned in the issue. Replace applicable references with "Gateway" consistently and verify that no unintended Broadcaster references remain.