Websocket connection URL and websocket connection history should be saved

[RunzhongHuang]

Is your feature request related to a problem? Please describe.
My own project requires me to switch and test web socket connection between multiple endpoints from different environments. Currently the ARC is able to handle multiple web socket connections in multiple tabs, which is great. But when I restart ARC, I need to type all these URL again and establish my web socket connection.

Describe the solution you'd like
I would like to have following features:

1. Able to save web socket URL. (Just the URL for quickly reconnect, not the request message)
2. Able to show the history for web socket connection. (Just the URL for quickly reconnect, not the request message)

Additional context
The ARC previously has the "previous connections" option, but v17.0.9 doesn't have any histories about web socket connection.