playground: rule names only update once you edit the grammar

[Jamalam360]

Reproduction:

1. go to https://pest.rs/?g=eyJncmFtbWFyIjoiV0hJVEVTUEFDRSA9IF97IFwiIFwiIHwgXCJcXHJcIiB8IFwiXFx0XCIgfCBcIlxcblwiIH1cblxuZmxvdyA9IF97IG5vZGUrIH1cbm5vZGUgPSBfe1xuICB8IFwiUEFUSFwiIH4gcGF0aFxuICB8IFwiVEFSR0VUXCIgfiB0YXJnZXRcbn1cblxucGF0aCA9IHsgKCFORVdMSU5FIH4gQU5ZKSsgfVxudGFyZ2V0ID0ge1xuICB8IFwiZmlsZW5hbWVcIlxuICB8IFwiY29udGVudFwiXG59IiwiaW5wdXQiOiJUQVJHRVQgZmlsZW5hbWVcblBBVEggLi9wYXRoL2hlcmVcbnRlc3RcbiJ9#editor
2. The rule name box is empty
3. Edit grammar (e.g. add a space)
4. Rule box is filled

Should be an easy fix for someone with the time and code familiarity :)

[Jamalam360]

Curiously it is working now

[tristan-f-r]

I was able to reproduce it as well - it may be a simple script loading issue (race condition). I'll make a PR to fix it.

[Jamalam360]

I still get this