Group Webhooks UI incorrectly references Work Items events
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### Proposal
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When creating a group webhook, the UI currently shows a variety of triggers; one of which is "Issues events" (see below). It only makes reference to issues, not epics. But, with the new work items change, it now seems that it's returning events for epics as well, suggesting it's miss-named.
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@jnutt confirmed that this is the case, and that the UI is out-of-sync with the API and documentation.
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issue