Add optional chaining for focusEditor in ScriptHostFunctions

[ikoamu]

Hello. I found a bug in v1.2.0.

When GAS is deployed as a simple web application that is not on a Google Docs or Sheets dialog or sidebar, the following error occurs because google.script.host.editor is undefined:

userCodeAppPanel:104 Uncaught TypeError: Cannot read properties of undefined (reading 'focus')
    at A.initializeScriptHostFunctions (userCodeAppPanel:104:3469)
    at new A (userCodeAppPanel:104:3202)
    at new H (userCodeAppPanel:104:19612)
    at userCodeAppPanel:104:20319

Therefore, I've implemented optional chaining so that errors no longer occur even when google.script.host.editor is undefined.

[enuchi]

Thanks for catching this @ikoamu and for the fix. I published this as a prerelease for testing: [email protected]. Do you mind installing it with your webapp project and seeing if it works as expected?

[ikoamu]

@enuchi
Perfect. I've confirmed that it works without any issues with version 1.2.1-pr.1.
Thank you for the quick response and for adding the tests!

[enuchi]

Now published as 1.2.1. Thanks for the help on this one @ikoamu!