Cancel running requests when discarding or publishing content

[bastianallgeier]

Description

This PR makes sure that discard and publish requests cancel ongoing or schedule save requests properly, to avoid race conditions.

Summary of changes

• The method to cancel throttled functions
• New panel.content.cancelSaving() method
• panel.content.discard() and panel.content.publish() cancel any ongoing or scheduled save requests. They also no longer can be executed for other views than the current one.
• panel.content.save() no longer sets the isProcessing flag. Otherwise, discard and publish will be blocked.

Ready?

• In-code documentation (wherever needed)
• Unit tests for fixed bug/feature
• Tests and CI checks all pass

For review team

• Add lab and/or sandbox examples (wherever helpful)
• Add changes & docs to release notes draft in Notion

[afbora]

If I'm missing nothing, works great for me 🎉

[bastianallgeier]

I think we can never know 100% if we miss something until more real-life tests are made during the beta. But it's great to hear that you also don't run into further issues.