Allow webclient to be modified through configuration

[guusdk]

The Converse-based web chat client offers a lot of features. Not all of those are always desirable, as indicated by this feedback that I received.

Since this is going to be a public-facing chat support; I was able to:
1, Hide the user list in chat along with room details, and the toolbar using:
.show-room-details-modal, .occupants, .chat-toolbar {
display:none !important;
}

2, I was able to have JS to rename the chatbox from the random identifier to a string using:
setInterval(() => {
$('.chat-title,.restore-chat').text('Support Chat');
},'100');

Is there a programmatic way to hide features, or rename the chatbox?

The implementation should be configurable to hide/show features, and otherwise apply minor changes.