Provide a way for automatically filling vacancies

[rgoj]

At the moment, when you create a vacancy and then someone fills that role, the vacancy does not get automatically assigned as a role or removed as a vacancy. There is an obvious manual workaround, so this isn't particularly high priority.

It is something that gets requested from time to time though, here are two support threads I can find (and I noted in one of them that it had been requested a couple of times before, presumably via other channels):

• https://app.intercom.com/a/inbox/q3x5lnhp/inbox/search/conversation/106323200002315?query=vacancies&view=List
• https://app.intercom.com/a/inbox/q3x5lnhp/inbox/search/conversation/106323200016238?query=vacancies&view=List

[rgoj]

Cited here as one of the reasons for not going ahead with using Maptio!
https://app.intercom.com/a/inbox/q3x5lnhp/inbox/conversation/106323200016942?view=List