Automatically clear dependent selection fields when modifying a parent selection

[jeremystretch]

NetBox version

v3.6.4

Feature type

Change to existing functionality

Proposed functionality

When selecting a different option of a selection field, any dependent selection fields should be reset. For example, when editing a device which currently assigned to a site and location, changing the value of the site field in the form should clear the value of the location field.

Use case

This will avoid user confusion by making it clear that the previously populated selection in the dependent field is no longer valid and a new selection must be made (where applicable).

Database changes

No response

External dependencies

No response

[github-actions]

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[jeremystretch]

Now that #14917 is wrapping up, this is something we should revisit in v4.0.

[jeremystretch]

This ended up being a trivial change, so I've bundled it with #14917 in PR #15080.