Replace "on menu opening/toggle" listeners with observe

[fregante]

Most likely none of these actually need to use the toggle event and we can just observe the exact element we need

https://github.com/search?q=repo%3Arefined-github%2Frefined-github%20%27toggle%27&type=code

There are probably more listeners that use click to do the same thing, we might need to look at every delegate use

Part of:

• Drop most custom event listeners #5992

[fregante]

Eh, the idea is there, but rewriting isn't necessary.

In some cases, we do want to listen to the toggle event, because observe only acts once.