Add a way to specify a new token from the recent connections window.

[bcpeinhardt]

I also find Coder's plugin UX to be hard to deal with around tokens. For example, I can open up Gateway and click Coder in the side bar. Then I'm met with red text:
Token was rejected by https://dev.coder.com; has your token expired?
But, there is nothing to click or do to correct this: no button or link. It turns out that you have to click the "+" as if you're starting a whole new connection, even though I already what I want in the "Recent projects".

^^ Comment from recent discussion of Jetbrains UX

[matifali]

Related #393