Add a check to open the snapshot list model to
check the repo and and date stamp matches values from the API snapshot task.

After this [1] `if context is ViaREST:` section, create a section `if context is if context is ViaWebUI:`

[1] https://gitlab.cee.redhat.com/insights-qe/iqe-content-sources-plugin/-/blob/master/iqe_content_sources/tests/test_repositories.py?ref_type=heads#L521