Detect unload when editing templates and automatically unlock.

[benloh]

Noted by Joshua in #200:
If you go to edit a template, then navigate away in some way (e.g., reloading the page), then the network remains locked and there is no way to unlock it without a restart. Can we use the navigate away to trigger the unlock in one manner?

[benloh]

Fixed by 3244155

[benloh]

@jdanish This should be fixed by the latest push 3244155 Please test and verify and close if it's addressed.

[jdanish]

I still see it happening?

Steps:

1. Open network
2. Click more / edit template
3. Click to edit edges
4. Reload page
5. You can't edit nodes or the template

[jdanish]

Nevermind. Tried npm ci and then re-ran and now seems good.

[benloh]

There may be some edge conditions I didn't quite catch. It's rather finicky because there are so many variations on sequence. I tried to simplify it as much as I could.

But the main reason it probably failed for you the first time is because you need to quit and restart the server for the server changes to take effect -- the hot-reload only works for the client side files.

[jdanish]

Yeah - I restarted but this one was definitely the npm ci I think.